Jasta 15 was created from Kampfenseitzer Kommando Habsheim on 28 September
1916. Ernest Udet was their first ace. Js15 joined the newly formed JG.II
under von Tutschek in November 1917. Upon Tutschek's death in March, Berthold
took command of JG.II. When he came to JG.II he brought all the pilots
and aircraft from Jasta 18 with him along with their red noses and blue
fuselage and tails. The pilots and aircraft previously serving at Js15
then went to Js18.