As one of the largest and most prominently placed buildings on the post, the cavalry drill house readily grabs your attention. It was built in 1907 so the cavalry could train indoors during Minnesota's bitter winters. A spectator's platform was installed in 1922 and a heating system in 1926. During WWII it was used to house 850 men at a time who were being processed into the Army.

Currently the fieldhouse is owned by the Mineapolis Park Board and is for sale for $4,000,000. Includes 7 acres of land.