The Fort Des Moines Provisional Army Officer Training School was a military base and training facility on the south side of Des Moines, Iowa. Established in 1901, the base is notable as the place where African Americans were trained to be officers for the U.S. Army during World War I, and where women first began training for US Army service in 1942 as part of the Women's Army Corps. Surviving older portions of the base were declared a National Historic Landmark in 1974 in recognition of this history. The fort property was turned over to the city in the 1950s, and has since been put a number of public and private uses.