 Jeschonnek joined the "Freikorps" aerial detachments, "Grenzschutz Fliegerabteilungen" (GFA) in flew in the same conflict.He then worked under Kurt Student, "Inspectorate of Arms Equipment" in the Army Ordnance Department from 1923–1928 and studied at the General Staff.The lack of German equipment at this time allowed Jeschonnek to visit a number of other countries and fly a number of Dutch, Swedish and Swiss aircraft.