United States military chocolate

Military chocolate has been a part of U.S. armed forces rations since 1937, and is issued to troops as part of basic field rations and sundry packs. Chocolate rations served two purposes: as a morale boost, and as a high-energy, pocket-sized emergency ration. 

Other websites
 Hershey Archives — Ration D Bar 
 Hershey Archives — Tropical Bar History 

Category:American food
Category:Military of the United States
Category:1937 establishments in the United States