Ernst Udet
By the end of 1917 the success of "Jagdgeschwader I" meant several other similar formations were then formed in February 1918, with "Jagdgeschwader II" operating against both the French and the British and "Jagdgeschwader III" on the Ypres front. At this time Richthofen recruited Hans Kirchstein and Fritz Friedrichs from two-seater units, and Ernst Udet from "Jasta" 37.