Behind Enemy Lines, The Marines Fight On.... This photograph vividly portrays the action as Marine Raider and Paratroop units landed on a beach on Bougainville eight miles behind the Japanese lines to raid an enemy supply area. Here on the beach, at the edge of the jungle, Marines fire at snipers in the trees who are attempting to knock out the captured field gun (left, background) which has been turned against them. The boxes on the sand contain ammunition for the 37mm. July 16. 1945. (Photo by Official U.S. Marine Corps Photograph).