Erhard Milch
Sperrle joined the "Freikorps" and commanded an aviation detachment. He then joined the "Reichswehr". Sperrle commanded units in Silesia including the "Freiwilligen Fliegerabteilungen" 412 under the leadership of Erhard Milch. Sperrle fought on the East Prussia border during the 1919 conflict with Poland. He assumed command on 9 January 1919.