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 trained African American officers for the U.S. Army during World War I and was 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.