A military cooperative is an organization that provides service members with products at a low profit margin and protects them from profiteering. Such organisations were popular in a number of countries, particularly in the 19th and early 20th centuries.
Among others, they were popular in Poland in the interwar period. In the United Kingdom the Army & Navy Co-operative Society was founded in 1871 but ceased to be a cooperative in 1934, becoming a provincial department store. The Canteen and Mess Co-operative Society, founded in 1894, operated canteens on a cooperative basis until absorbed into a government body during the First World War. This later developed into the Navy, Army and Air Force Institutes (NAAFI) which continues to provide services to the British military.