Learn more about the U.S. Marine Corps Learn more about recovery efforts of other partners. Learn more about the Endangered Species program of the U.S. Fish and Wildlife Service.		A larger image is available by clicking on the poster. Lean Green Fighting Machine View in Adobe PDF format. At Marine Corps Recruit Depot Parris Island, SC, some of the finest Marines are trained. They test their strength as they maneuver through some of the most challenging environmental conditions, mud, swamps, insects, and heat. Sharing that environment is the once endangered American alligator. The Marines, with the help of the U.S. Fish and Wildlife Service, are working to protect endangered and sensitive species while maintaining military preparedness. The result at Parris Island is two species of Lean Green Fighting Machines are thriving! That's what happens when some of your best friends are Marines.