The base pool needs cleaning

The base pool needs cleaning A Marine with 2nd Platoon, Company B., Battalion Landing Team 1st Battalion, 4th Marines, 31st Marine Expeditionary Unit, crawls through a watery ditch and under concertina wire during the Jungle Endurance Course here, April 20. After completing a two-week training evolution at the Jungle Warfare Training Center, the Marines underwent the four-mile-long course through the Okinawan jungle, utilizing the rappelling, rope-crossing, improvised stretcher carry and other skills they learned. The 31st MEU is the only continuously forward-deployed MEU and remains the nation's force in readiness in the Asia-Pacific region. Photo by Cpl Jonathan Wright.

Armed Forces Salute A Marine with 2nd Platoon, Company B., Battalion Landing Team 1st Battalion, 4th Marines, 31st Marine Expeditionary Unit, crawls through a watery ditch and under concertina wire during the Jungle Endurance Course here, April 20. After completing a two-week training evolution at the Jungle Warfare Training Center, the Marines underwent the four-mile-long course through the Okinawan jungle, utilizing the rappelling, rope-crossing, improvised stretcher carry and other skills they learned. The 31st MEU is the only continuously forward-deployed MEU and remains the nation's force in readiness in the Asia-Pacific region. Photo by Cpl Jonathan Wright.

Gripping Grenades A Marine with 2nd Platoon, Company B., Battalion Landing Team 1st Battalion, 4th Marines, 31st Marine Expeditionary Unit, crawls through a watery ditch and under concertina wire during the Jungle Endurance Course here, April 20. After completing a two-week training evolution at the Jungle Warfare Training Center, the Marines underwent the four-mile-long course through the Okinawan jungle, utilizing the rappelling, rope-crossing, improvised stretcher carry and other skills they learned. The 31st MEU is the only continuously forward-deployed MEU and remains the nation's force in readiness in the Asia-Pacific region. Photo by Cpl Jonathan Wright.

Sunset Salute at Sea A Marine with 2nd Platoon, Company B., Battalion Landing Team 1st Battalion, 4th Marines, 31st Marine Expeditionary Unit, crawls through a watery ditch and under concertina wire during the Jungle Endurance Course here, April 20. After completing a two-week training evolution at the Jungle Warfare Training Center, the Marines underwent the four-mile-long course through the Okinawan jungle, utilizing the rappelling, rope-crossing, improvised stretcher carry and other skills they learned. The 31st MEU is the only continuously forward-deployed MEU and remains the nation's force in readiness in the Asia-Pacific region. Photo by Cpl Jonathan Wright.

Two Flags up A Marine with 2nd Platoon, Company B., Battalion Landing Team 1st Battalion, 4th Marines, 31st Marine Expeditionary Unit, crawls through a watery ditch and under concertina wire during the Jungle Endurance Course here, April 20. After completing a two-week training evolution at the Jungle Warfare Training Center, the Marines underwent the four-mile-long course through the Okinawan jungle, utilizing the rappelling, rope-crossing, improvised stretcher carry and other skills they learned. The 31st MEU is the only continuously forward-deployed MEU and remains the nation's force in readiness in the Asia-Pacific region. Photo by Cpl Jonathan Wright.

Marine Barracks 8th & I A Marine with 2nd Platoon, Company B., Battalion Landing Team 1st Battalion, 4th Marines, 31st Marine Expeditionary Unit, crawls through a watery ditch and under concertina wire during the Jungle Endurance Course here, April 20. After completing a two-week training evolution at the Jungle Warfare Training Center, the Marines underwent the four-mile-long course through the Okinawan jungle, utilizing the rappelling, rope-crossing, improvised stretcher carry and other skills they learned. The 31st MEU is the only continuously forward-deployed MEU and remains the nation's force in readiness in the Asia-Pacific region. Photo by Cpl Jonathan Wright.

The United States Marine Drum & Bugle Corps A Marine with 2nd Platoon, Company B., Battalion Landing Team 1st Battalion, 4th Marines, 31st Marine Expeditionary Unit, crawls through a watery ditch and under concertina wire during the Jungle Endurance Course here, April 20. After completing a two-week training evolution at the Jungle Warfare Training Center, the Marines underwent the four-mile-long course through the Okinawan jungle, utilizing the rappelling, rope-crossing, improvised stretcher carry and other skills they learned. The 31st MEU is the only continuously forward-deployed MEU and remains the nation's force in readiness in the Asia-Pacific region. Photo by Cpl Jonathan Wright.

Helo Hellfire A Marine with 2nd Platoon, Company B., Battalion Landing Team 1st Battalion, 4th Marines, 31st Marine Expeditionary Unit, crawls through a watery ditch and under concertina wire during the Jungle Endurance Course here, April 20. After completing a two-week training evolution at the Jungle Warfare Training Center, the Marines underwent the four-mile-long course through the Okinawan jungle, utilizing the rappelling, rope-crossing, improvised stretcher carry and other skills they learned. The 31st MEU is the only continuously forward-deployed MEU and remains the nation's force in readiness in the Asia-Pacific region. Photo by Cpl Jonathan Wright.

Marine Corps Air Ground Combat Center Twentynine Palms A Marine with 2nd Platoon, Company B., Battalion Landing Team 1st Battalion, 4th Marines, 31st Marine Expeditionary Unit, crawls through a watery ditch and under concertina wire during the Jungle Endurance Course here, April 20. After completing a two-week training evolution at the Jungle Warfare Training Center, the Marines underwent the four-mile-long course through the Okinawan jungle, utilizing the rappelling, rope-crossing, improvised stretcher carry and other skills they learned. The 31st MEU is the only continuously forward-deployed MEU and remains the nation's force in readiness in the Asia-Pacific region. Photo by Cpl Jonathan Wright.

3rd Marine Aircraft Wing A Marine with 2nd Platoon, Company B., Battalion Landing Team 1st Battalion, 4th Marines, 31st Marine Expeditionary Unit, crawls through a watery ditch and under concertina wire during the Jungle Endurance Course here, April 20. After completing a two-week training evolution at the Jungle Warfare Training Center, the Marines underwent the four-mile-long course through the Okinawan jungle, utilizing the rappelling, rope-crossing, improvised stretcher carry and other skills they learned. The 31st MEU is the only continuously forward-deployed MEU and remains the nation's force in readiness in the Asia-Pacific region. Photo by Cpl Jonathan Wright.

Force in Readiness A Marine with 2nd Platoon, Company B., Battalion Landing Team 1st Battalion, 4th Marines, 31st Marine Expeditionary Unit, crawls through a watery ditch and under concertina wire during the Jungle Endurance Course here, April 20. After completing a two-week training evolution at the Jungle Warfare Training Center, the Marines underwent the four-mile-long course through the Okinawan jungle, utilizing the rappelling, rope-crossing, improvised stretcher carry and other skills they learned. The 31st MEU is the only continuously forward-deployed MEU and remains the nation's force in readiness in the Asia-Pacific region. Photo by Cpl Jonathan Wright.

Helicopter Support Team facilitates artillery retrograde A Marine with 2nd Platoon, Company B., Battalion Landing Team 1st Battalion, 4th Marines, 31st Marine Expeditionary Unit, crawls through a watery ditch and under concertina wire during the Jungle Endurance Course here, April 20. After completing a two-week training evolution at the Jungle Warfare Training Center, the Marines underwent the four-mile-long course through the Okinawan jungle, utilizing the rappelling, rope-crossing, improvised stretcher carry and other skills they learned. The 31st MEU is the only continuously forward-deployed MEU and remains the nation's force in readiness in the Asia-Pacific region. Photo by Cpl Jonathan Wright.

Ugly Angels A Marine with 2nd Platoon, Company B., Battalion Landing Team 1st Battalion, 4th Marines, 31st Marine Expeditionary Unit, crawls through a watery ditch and under concertina wire during the Jungle Endurance Course here, April 20. After completing a two-week training evolution at the Jungle Warfare Training Center, the Marines underwent the four-mile-long course through the Okinawan jungle, utilizing the rappelling, rope-crossing, improvised stretcher carry and other skills they learned. The 31st MEU is the only continuously forward-deployed MEU and remains the nation's force in readiness in the Asia-Pacific region. Photo by Cpl Jonathan Wright.

31st MEU’s Helicopter Company raids urban combat facility A Marine with 2nd Platoon, Company B., Battalion Landing Team 1st Battalion, 4th Marines, 31st Marine Expeditionary Unit, crawls through a watery ditch and under concertina wire during the Jungle Endurance Course here, April 20. After completing a two-week training evolution at the Jungle Warfare Training Center, the Marines underwent the four-mile-long course through the Okinawan jungle, utilizing the rappelling, rope-crossing, improvised stretcher carry and other skills they learned. The 31st MEU is the only continuously forward-deployed MEU and remains the nation's force in readiness in the Asia-Pacific region. Photo by Cpl Jonathan Wright.

Fuel Fire Fury A Marine with 2nd Platoon, Company B., Battalion Landing Team 1st Battalion, 4th Marines, 31st Marine Expeditionary Unit, crawls through a watery ditch and under concertina wire during the Jungle Endurance Course here, April 20. After completing a two-week training evolution at the Jungle Warfare Training Center, the Marines underwent the four-mile-long course through the Okinawan jungle, utilizing the rappelling, rope-crossing, improvised stretcher carry and other skills they learned. The 31st MEU is the only continuously forward-deployed MEU and remains the nation's force in readiness in the Asia-Pacific region. Photo by Cpl Jonathan Wright.

Stallion Stack A Marine with 2nd Platoon, Company B., Battalion Landing Team 1st Battalion, 4th Marines, 31st Marine Expeditionary Unit, crawls through a watery ditch and under concertina wire during the Jungle Endurance Course here, April 20. After completing a two-week training evolution at the Jungle Warfare Training Center, the Marines underwent the four-mile-long course through the Okinawan jungle, utilizing the rappelling, rope-crossing, improvised stretcher carry and other skills they learned. The 31st MEU is the only continuously forward-deployed MEU and remains the nation's force in readiness in the Asia-Pacific region. Photo by Cpl Jonathan Wright.

The Engineers that could A Marine with 2nd Platoon, Company B., Battalion Landing Team 1st Battalion, 4th Marines, 31st Marine Expeditionary Unit, crawls through a watery ditch and under concertina wire during the Jungle Endurance Course here, April 20. After completing a two-week training evolution at the Jungle Warfare Training Center, the Marines underwent the four-mile-long course through the Okinawan jungle, utilizing the rappelling, rope-crossing, improvised stretcher carry and other skills they learned. The 31st MEU is the only continuously forward-deployed MEU and remains the nation's force in readiness in the Asia-Pacific region. Photo by Cpl Jonathan Wright.

Cushy Ride A Marine with 2nd Platoon, Company B., Battalion Landing Team 1st Battalion, 4th Marines, 31st Marine Expeditionary Unit, crawls through a watery ditch and under concertina wire during the Jungle Endurance Course here, April 20. After completing a two-week training evolution at the Jungle Warfare Training Center, the Marines underwent the four-mile-long course through the Okinawan jungle, utilizing the rappelling, rope-crossing, improvised stretcher carry and other skills they learned. The 31st MEU is the only continuously forward-deployed MEU and remains the nation's force in readiness in the Asia-Pacific region. Photo by Cpl Jonathan Wright.

Go Time A Marine with 2nd Platoon, Company B., Battalion Landing Team 1st Battalion, 4th Marines, 31st Marine Expeditionary Unit, crawls through a watery ditch and under concertina wire during the Jungle Endurance Course here, April 20. After completing a two-week training evolution at the Jungle Warfare Training Center, the Marines underwent the four-mile-long course through the Okinawan jungle, utilizing the rappelling, rope-crossing, improvised stretcher carry and other skills they learned. The 31st MEU is the only continuously forward-deployed MEU and remains the nation's force in readiness in the Asia-Pacific region. Photo by Cpl Jonathan Wright.

31st MEU: Re-enlisting in the water A Marine with 2nd Platoon, Company B., Battalion Landing Team 1st Battalion, 4th Marines, 31st Marine Expeditionary Unit, crawls through a watery ditch and under concertina wire during the Jungle Endurance Course here, April 20. After completing a two-week training evolution at the Jungle Warfare Training Center, the Marines underwent the four-mile-long course through the Okinawan jungle, utilizing the rappelling, rope-crossing, improvised stretcher carry and other skills they learned. The 31st MEU is the only continuously forward-deployed MEU and remains the nation's force in readiness in the Asia-Pacific region. Photo by Cpl Jonathan Wright.

Uniting A Nation A Marine with 2nd Platoon, Company B., Battalion Landing Team 1st Battalion, 4th Marines, 31st Marine Expeditionary Unit, crawls through a watery ditch and under concertina wire during the Jungle Endurance Course here, April 20. After completing a two-week training evolution at the Jungle Warfare Training Center, the Marines underwent the four-mile-long course through the Okinawan jungle, utilizing the rappelling, rope-crossing, improvised stretcher carry and other skills they learned. The 31st MEU is the only continuously forward-deployed MEU and remains the nation's force in readiness in the Asia-Pacific region. Photo by Cpl Jonathan Wright.

31st MEU: Exercise Hamel 2012 A Marine with 2nd Platoon, Company B., Battalion Landing Team 1st Battalion, 4th Marines, 31st Marine Expeditionary Unit, crawls through a watery ditch and under concertina wire during the Jungle Endurance Course here, April 20. After completing a two-week training evolution at the Jungle Warfare Training Center, the Marines underwent the four-mile-long course through the Okinawan jungle, utilizing the rappelling, rope-crossing, improvised stretcher carry and other skills they learned. The 31st MEU is the only continuously forward-deployed MEU and remains the nation's force in readiness in the Asia-Pacific region. Photo by Cpl Jonathan Wright.

1st MEB: Antenna Up A Marine with 2nd Platoon, Company B., Battalion Landing Team 1st Battalion, 4th Marines, 31st Marine Expeditionary Unit, crawls through a watery ditch and under concertina wire during the Jungle Endurance Course here, April 20. After completing a two-week training evolution at the Jungle Warfare Training Center, the Marines underwent the four-mile-long course through the Okinawan jungle, utilizing the rappelling, rope-crossing, improvised stretcher carry and other skills they learned. The 31st MEU is the only continuously forward-deployed MEU and remains the nation's force in readiness in the Asia-Pacific region. Photo by Cpl Jonathan Wright.

Don't Look Down A Marine with 2nd Platoon, Company B., Battalion Landing Team 1st Battalion, 4th Marines, 31st Marine Expeditionary Unit, crawls through a watery ditch and under concertina wire during the Jungle Endurance Course here, April 20. After completing a two-week training evolution at the Jungle Warfare Training Center, the Marines underwent the four-mile-long course through the Okinawan jungle, utilizing the rappelling, rope-crossing, improvised stretcher carry and other skills they learned. The 31st MEU is the only continuously forward-deployed MEU and remains the nation's force in readiness in the Asia-Pacific region. Photo by Cpl Jonathan Wright.

1st MEB: Amphibious Assault A Marine with 2nd Platoon, Company B., Battalion Landing Team 1st Battalion, 4th Marines, 31st Marine Expeditionary Unit, crawls through a watery ditch and under concertina wire during the Jungle Endurance Course here, April 20. After completing a two-week training evolution at the Jungle Warfare Training Center, the Marines underwent the four-mile-long course through the Okinawan jungle, utilizing the rappelling, rope-crossing, improvised stretcher carry and other skills they learned. The 31st MEU is the only continuously forward-deployed MEU and remains the nation's force in readiness in the Asia-Pacific region. Photo by Cpl Jonathan Wright.

Resupply Run A Marine with 2nd Platoon, Company B., Battalion Landing Team 1st Battalion, 4th Marines, 31st Marine Expeditionary Unit, crawls through a watery ditch and under concertina wire during the Jungle Endurance Course here, April 20. After completing a two-week training evolution at the Jungle Warfare Training Center, the Marines underwent the four-mile-long course through the Okinawan jungle, utilizing the rappelling, rope-crossing, improvised stretcher carry and other skills they learned. The 31st MEU is the only continuously forward-deployed MEU and remains the nation's force in readiness in the Asia-Pacific region. Photo by Cpl Jonathan Wright.

Clear Skies Ahead A Marine with 2nd Platoon, Company B., Battalion Landing Team 1st Battalion, 4th Marines, 31st Marine Expeditionary Unit, crawls through a watery ditch and under concertina wire during the Jungle Endurance Course here, April 20. After completing a two-week training evolution at the Jungle Warfare Training Center, the Marines underwent the four-mile-long course through the Okinawan jungle, utilizing the rappelling, rope-crossing, improvised stretcher carry and other skills they learned. The 31st MEU is the only continuously forward-deployed MEU and remains the nation's force in readiness in the Asia-Pacific region. Photo by Cpl Jonathan Wright.

Magic School Bus A Marine with 2nd Platoon, Company B., Battalion Landing Team 1st Battalion, 4th Marines, 31st Marine Expeditionary Unit, crawls through a watery ditch and under concertina wire during the Jungle Endurance Course here, April 20. After completing a two-week training evolution at the Jungle Warfare Training Center, the Marines underwent the four-mile-long course through the Okinawan jungle, utilizing the rappelling, rope-crossing, improvised stretcher carry and other skills they learned. The 31st MEU is the only continuously forward-deployed MEU and remains the nation's force in readiness in the Asia-Pacific region. Photo by Cpl Jonathan Wright.

We have you covered A Marine with 2nd Platoon, Company B., Battalion Landing Team 1st Battalion, 4th Marines, 31st Marine Expeditionary Unit, crawls through a watery ditch and under concertina wire during the Jungle Endurance Course here, April 20. After completing a two-week training evolution at the Jungle Warfare Training Center, the Marines underwent the four-mile-long course through the Okinawan jungle, utilizing the rappelling, rope-crossing, improvised stretcher carry and other skills they learned. The 31st MEU is the only continuously forward-deployed MEU and remains the nation's force in readiness in the Asia-Pacific region. Photo by Cpl Jonathan Wright.

Dad, You're #1 A Marine with 2nd Platoon, Company B., Battalion Landing Team 1st Battalion, 4th Marines, 31st Marine Expeditionary Unit, crawls through a watery ditch and under concertina wire during the Jungle Endurance Course here, April 20. After completing a two-week training evolution at the Jungle Warfare Training Center, the Marines underwent the four-mile-long course through the Okinawan jungle, utilizing the rappelling, rope-crossing, improvised stretcher carry and other skills they learned. The 31st MEU is the only continuously forward-deployed MEU and remains the nation's force in readiness in the Asia-Pacific region. Photo by Cpl Jonathan Wright.

Base Defender A Marine with 2nd Platoon, Company B., Battalion Landing Team 1st Battalion, 4th Marines, 31st Marine Expeditionary Unit, crawls through a watery ditch and under concertina wire during the Jungle Endurance Course here, April 20. After completing a two-week training evolution at the Jungle Warfare Training Center, the Marines underwent the four-mile-long course through the Okinawan jungle, utilizing the rappelling, rope-crossing, improvised stretcher carry and other skills they learned. The 31st MEU is the only continuously forward-deployed MEU and remains the nation's force in readiness in the Asia-Pacific region. Photo by Cpl Jonathan Wright.

Operation Branding Iron A Marine with 2nd Platoon, Company B., Battalion Landing Team 1st Battalion, 4th Marines, 31st Marine Expeditionary Unit, crawls through a watery ditch and under concertina wire during the Jungle Endurance Course here, April 20. After completing a two-week training evolution at the Jungle Warfare Training Center, the Marines underwent the four-mile-long course through the Okinawan jungle, utilizing the rappelling, rope-crossing, improvised stretcher carry and other skills they learned. The 31st MEU is the only continuously forward-deployed MEU and remains the nation's force in readiness in the Asia-Pacific region. Photo by Cpl Jonathan Wright.

Man's best friend and Marine A Marine with 2nd Platoon, Company B., Battalion Landing Team 1st Battalion, 4th Marines, 31st Marine Expeditionary Unit, crawls through a watery ditch and under concertina wire during the Jungle Endurance Course here, April 20. After completing a two-week training evolution at the Jungle Warfare Training Center, the Marines underwent the four-mile-long course through the Okinawan jungle, utilizing the rappelling, rope-crossing, improvised stretcher carry and other skills they learned. The 31st MEU is the only continuously forward-deployed MEU and remains the nation's force in readiness in the Asia-Pacific region. Photo by Cpl Jonathan Wright.

A Marine honors the fallen A Marine with 2nd Platoon, Company B., Battalion Landing Team 1st Battalion, 4th Marines, 31st Marine Expeditionary Unit, crawls through a watery ditch and under concertina wire during the Jungle Endurance Course here, April 20. After completing a two-week training evolution at the Jungle Warfare Training Center, the Marines underwent the four-mile-long course through the Okinawan jungle, utilizing the rappelling, rope-crossing, improvised stretcher carry and other skills they learned. The 31st MEU is the only continuously forward-deployed MEU and remains the nation's force in readiness in the Asia-Pacific region. Photo by Cpl Jonathan Wright.

A lifetime of service A Marine with 2nd Platoon, Company B., Battalion Landing Team 1st Battalion, 4th Marines, 31st Marine Expeditionary Unit, crawls through a watery ditch and under concertina wire during the Jungle Endurance Course here, April 20. After completing a two-week training evolution at the Jungle Warfare Training Center, the Marines underwent the four-mile-long course through the Okinawan jungle, utilizing the rappelling, rope-crossing, improvised stretcher carry and other skills they learned. The 31st MEU is the only continuously forward-deployed MEU and remains the nation's force in readiness in the Asia-Pacific region. Photo by Cpl Jonathan Wright.

Chow Time A Marine with 2nd Platoon, Company B., Battalion Landing Team 1st Battalion, 4th Marines, 31st Marine Expeditionary Unit, crawls through a watery ditch and under concertina wire during the Jungle Endurance Course here, April 20. After completing a two-week training evolution at the Jungle Warfare Training Center, the Marines underwent the four-mile-long course through the Okinawan jungle, utilizing the rappelling, rope-crossing, improvised stretcher carry and other skills they learned. The 31st MEU is the only continuously forward-deployed MEU and remains the nation's force in readiness in the Asia-Pacific region. Photo by Cpl Jonathan Wright.

Vertical Takeoff A Marine with 2nd Platoon, Company B., Battalion Landing Team 1st Battalion, 4th Marines, 31st Marine Expeditionary Unit, crawls through a watery ditch and under concertina wire during the Jungle Endurance Course here, April 20. After completing a two-week training evolution at the Jungle Warfare Training Center, the Marines underwent the four-mile-long course through the Okinawan jungle, utilizing the rappelling, rope-crossing, improvised stretcher carry and other skills they learned. The 31st MEU is the only continuously forward-deployed MEU and remains the nation's force in readiness in the Asia-Pacific region. Photo by Cpl Jonathan Wright.

Mojave Viper training – machine gun position A Marine with 2nd Platoon, Company B., Battalion Landing Team 1st Battalion, 4th Marines, 31st Marine Expeditionary Unit, crawls through a watery ditch and under concertina wire during the Jungle Endurance Course here, April 20. After completing a two-week training evolution at the Jungle Warfare Training Center, the Marines underwent the four-mile-long course through the Okinawan jungle, utilizing the rappelling, rope-crossing, improvised stretcher carry and other skills they learned. The 31st MEU is the only continuously forward-deployed MEU and remains the nation's force in readiness in the Asia-Pacific region. Photo by Cpl Jonathan Wright.

'Payne Games' keeps Marines prepared A Marine with 2nd Platoon, Company B., Battalion Landing Team 1st Battalion, 4th Marines, 31st Marine Expeditionary Unit, crawls through a watery ditch and under concertina wire during the Jungle Endurance Course here, April 20. After completing a two-week training evolution at the Jungle Warfare Training Center, the Marines underwent the four-mile-long course through the Okinawan jungle, utilizing the rappelling, rope-crossing, improvised stretcher carry and other skills they learned. The 31st MEU is the only continuously forward-deployed MEU and remains the nation's force in readiness in the Asia-Pacific region. Photo by Cpl Jonathan Wright.

4th Recon Marines demonstrate the full capabilities of a Marine Air Ground Task Force A Marine with 2nd Platoon, Company B., Battalion Landing Team 1st Battalion, 4th Marines, 31st Marine Expeditionary Unit, crawls through a watery ditch and under concertina wire during the Jungle Endurance Course here, April 20. After completing a two-week training evolution at the Jungle Warfare Training Center, the Marines underwent the four-mile-long course through the Okinawan jungle, utilizing the rappelling, rope-crossing, improvised stretcher carry and other skills they learned. The 31st MEU is the only continuously forward-deployed MEU and remains the nation's force in readiness in the Asia-Pacific region. Photo by Cpl Jonathan Wright.

Eager Explosion A Marine with 2nd Platoon, Company B., Battalion Landing Team 1st Battalion, 4th Marines, 31st Marine Expeditionary Unit, crawls through a watery ditch and under concertina wire during the Jungle Endurance Course here, April 20. After completing a two-week training evolution at the Jungle Warfare Training Center, the Marines underwent the four-mile-long course through the Okinawan jungle, utilizing the rappelling, rope-crossing, improvised stretcher carry and other skills they learned. The 31st MEU is the only continuously forward-deployed MEU and remains the nation's force in readiness in the Asia-Pacific region. Photo by Cpl Jonathan Wright.

Fast Rope Fury A Marine with 2nd Platoon, Company B., Battalion Landing Team 1st Battalion, 4th Marines, 31st Marine Expeditionary Unit, crawls through a watery ditch and under concertina wire during the Jungle Endurance Course here, April 20. After completing a two-week training evolution at the Jungle Warfare Training Center, the Marines underwent the four-mile-long course through the Okinawan jungle, utilizing the rappelling, rope-crossing, improvised stretcher carry and other skills they learned. The 31st MEU is the only continuously forward-deployed MEU and remains the nation's force in readiness in the Asia-Pacific region. Photo by Cpl Jonathan Wright.

Recon Marines sprint into water A Marine with 2nd Platoon, Company B., Battalion Landing Team 1st Battalion, 4th Marines, 31st Marine Expeditionary Unit, crawls through a watery ditch and under concertina wire during the Jungle Endurance Course here, April 20. After completing a two-week training evolution at the Jungle Warfare Training Center, the Marines underwent the four-mile-long course through the Okinawan jungle, utilizing the rappelling, rope-crossing, improvised stretcher carry and other skills they learned. The 31st MEU is the only continuously forward-deployed MEU and remains the nation's force in readiness in the Asia-Pacific region. Photo by Cpl Jonathan Wright.

Marine hike 14/5 miles training for deployment A Marine with 2nd Platoon, Company B., Battalion Landing Team 1st Battalion, 4th Marines, 31st Marine Expeditionary Unit, crawls through a watery ditch and under concertina wire during the Jungle Endurance Course here, April 20. After completing a two-week training evolution at the Jungle Warfare Training Center, the Marines underwent the four-mile-long course through the Okinawan jungle, utilizing the rappelling, rope-crossing, improvised stretcher carry and other skills they learned. The 31st MEU is the only continuously forward-deployed MEU and remains the nation's force in readiness in the Asia-Pacific region. Photo by Cpl Jonathan Wright.

Marines train for the next level of martial arts A Marine with 2nd Platoon, Company B., Battalion Landing Team 1st Battalion, 4th Marines, 31st Marine Expeditionary Unit, crawls through a watery ditch and under concertina wire during the Jungle Endurance Course here, April 20. After completing a two-week training evolution at the Jungle Warfare Training Center, the Marines underwent the four-mile-long course through the Okinawan jungle, utilizing the rappelling, rope-crossing, improvised stretcher carry and other skills they learned. The 31st MEU is the only continuously forward-deployed MEU and remains the nation's force in readiness in the Asia-Pacific region. Photo by Cpl Jonathan Wright.

Marine Corps martial arts training A Marine with 2nd Platoon, Company B., Battalion Landing Team 1st Battalion, 4th Marines, 31st Marine Expeditionary Unit, crawls through a watery ditch and under concertina wire during the Jungle Endurance Course here, April 20. After completing a two-week training evolution at the Jungle Warfare Training Center, the Marines underwent the four-mile-long course through the Okinawan jungle, utilizing the rappelling, rope-crossing, improvised stretcher carry and other skills they learned. The 31st MEU is the only continuously forward-deployed MEU and remains the nation's force in readiness in the Asia-Pacific region. Photo by Cpl Jonathan Wright.

Poolees lift 500-pound tractor tire A Marine with 2nd Platoon, Company B., Battalion Landing Team 1st Battalion, 4th Marines, 31st Marine Expeditionary Unit, crawls through a watery ditch and under concertina wire during the Jungle Endurance Course here, April 20. After completing a two-week training evolution at the Jungle Warfare Training Center, the Marines underwent the four-mile-long course through the Okinawan jungle, utilizing the rappelling, rope-crossing, improvised stretcher carry and other skills they learned. The 31st MEU is the only continuously forward-deployed MEU and remains the nation's force in readiness in the Asia-Pacific region. Photo by Cpl Jonathan Wright.

Black Sea Rotational Force A Marine with 2nd Platoon, Company B., Battalion Landing Team 1st Battalion, 4th Marines, 31st Marine Expeditionary Unit, crawls through a watery ditch and under concertina wire during the Jungle Endurance Course here, April 20. After completing a two-week training evolution at the Jungle Warfare Training Center, the Marines underwent the four-mile-long course through the Okinawan jungle, utilizing the rappelling, rope-crossing, improvised stretcher carry and other skills they learned. The 31st MEU is the only continuously forward-deployed MEU and remains the nation's force in readiness in the Asia-Pacific region. Photo by Cpl Jonathan Wright.

School Security A Marine with 2nd Platoon, Company B., Battalion Landing Team 1st Battalion, 4th Marines, 31st Marine Expeditionary Unit, crawls through a watery ditch and under concertina wire during the Jungle Endurance Course here, April 20. After completing a two-week training evolution at the Jungle Warfare Training Center, the Marines underwent the four-mile-long course through the Okinawan jungle, utilizing the rappelling, rope-crossing, improvised stretcher carry and other skills they learned. The 31st MEU is the only continuously forward-deployed MEU and remains the nation's force in readiness in the Asia-Pacific region. Photo by Cpl Jonathan Wright.

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