It was called the Mounted Service School beginning in 1907 and until World War I when it resumed the name cavalry School. This continued until 1946,when the Army ended all training and educational programs dealing with equine-mounted troops. After 1950, it continued as the Army General School until May 1955. It is currently the headquarters for the U.S. 1st Infantry Division. The school did produce some DJs notably Jerry Boulding. But might be better known for training the Radio Broadcasting and Leaflet (RB&L) which went to Korea in 1951. They were a propaganda unit.
More interesting to you is probably that I scanned all 87 pages of their Basic Radio Theory text book. This book was used in the waning days of WWII at a military school that would cease teaching within a decade. Now it's a fascinating artifact. The book is typed and mimeographed, and hand illustrated. It's alternately a science text and how-to manual. It's worth the read.
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