U.S. Marines posing in amphibious alligator tank

View of U.S. Marines posing in amphibious alligator tank on shore, with other alligator tanks in background. Label on back: "Crossing terrain such as is shown in this picture, in the old days would have meant engineers bridging river and swamp with pontoon construction, often under fire. But this sort of crossing is 'duck soup' to the United States Marines with their 'alligator tanks,' officially known as amphibians. Down one beach, across the river, up another beach, no matter how swampy, the steel alligators roar, with a hail-storm of cannon fire and machine-gun bullets pouring out of the port-holes in their steel-armored turrent [sic] to mow down enemy opposition. Attacks like this, coupled with the United States Marines landing boats parachute troops carried in transport planes an gliders, make a leatherneck landing party something for Uncle Sam's enemies to worry about." Stamped on back: "Official photograph. Please credit U.S. Marine Corps." Handwritten on back: "Amphibious vehicles."