Complex sentence: JG 2's "Kommodore" and 102-kill ace Egon Mayer was shot down and killed in March 1944 and just over one month later his successor Major Kurt Ubben was also killed versus US fighters.
Split into simpler sentences: JG 2's commander and 102-kill ace Egon Mayer was shot down and killed in March 1944. One month later his successor Major Kurt Ubben was also killed by US fighters.