IX. Fliegerkorps (9th Air Corps) was formed in November 1940 in Jever from the 9. Flieger-Division and was redesignated as IX. Fliegerkorps (J)âÂÂthe suffix "J" stands for Jagd (fighter aircraft)âÂÂon 13 November 1944. The Corps at the time was leading numerous Kampfgeschwader which were converting to fighter aircraft. The Corps was renamed again on 26 January 1945, this time to IX. (J) Fliegerkorps.