For the world’s most formidable army, feeding the troops is fraught with logistical, psychological and food safety challenges. Bacteria is an enemy; supply chains are vital, intricate delivery systems. The goal is to provide sustenance and boost morale across the full range of terrain and troop configurations, from mess halls for the officers and selfservice buffets for the rank-and-file to battlefield canteens and survival rations for commandos behind enemy lines.

Solving this logistical puzzle is like trying to stuff a square peg into a round hole: once you have devised ways to optimize the daily nutritional requirements of the bodies in question, you need to work out the best solutions for preserving and transporting the food, and still guarantee a minimum level of flavor to keep the soldiers happy.

A glossary with 24 entries explains some of the acronyms used in the image captions, describes the staples of a typical soldier’s diet and traces the new technologies that enabled the food industry to manufacture and supply those rations.