Tarawa, I think. My Dad was Petty officer on an LCT there and had very similar pictures of the beach area about a week later. Same white sugar sand. He always said they pulled in as close as they could get to the beach and the it was a hell of artillery and machine gun fire. And all those marines just marched on down the ramps like it was a drill.

Should have waited for the right answer :-) Dad did Peleliu also.