World War II brought an economic upswing with the development of three ordnance plants in the county and the revitalization of the coal, railroad and agriculture industries. Terre Haute remained dependent on consumer manufacturers such as Quaker Maid, the world's largest food processing factory under one roof. The city was an enthusiastic participant in the war effort with troop send-offs, victory gardens, bond sales, civil defense drills, parades, and ceremonies. 1943 saw the opening of the country's 100th United Service Organizations (USO) facility in the city.