1943 U.S. Army K Ration Meal Pack Research Laboratory Image

The vintage image from March 1943 shows the subsistence research laboratory of the U.S. Army quartermaster depot in Chicago, Illinois. It features the K ration, a compact meal pack developed for military use. Weighing 32.86 ounces, it offers 3,726 calories across three meals and is designed to endure extreme temperatures. This innovation played a crucial role in sustaining soldiers during World War II.

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