Marines crouch in hastily dug foxholes along a rubble-strewn beachhead on Kwajalein Atoll as landing craft and an amphibian tractor sit in the shallows behind them. This official U.S. Marine Corps photograph, numbered K-12, documents the chaotic early hours of the amphibious assault during Operation Flintlock, the January-February 1944 campaign that broke the Japanese outer defensive ring in the Marshall Islands. Project: 218719