The following information is taken from Jon Guttman's wonderful Aircraft Of The Aces 123 - Reconnaissance And Bomber Aces Of WWI.
Wilhelm Fahlbusch was born in Hanover on 8 February 1892, and after
serving in FFA 11 he transferred to a bombing unit, Kampfstaffel 1 of
Kampfgeschwader der Obersten der Heeresleitung (Kagohl) 1, on 19 May
1916. There, he and Hans Rosenkrantz, who was born in
Wollstein on 6 August 1890, were credited with five victories,
although details of only two are known. On 9 July they shot
down an RE 7 of No 21 Sqn over Marcoing, killing its Canadian
pilot, 2Lt Charles V Hewson. Their fifth success was one of four
Martinsyde G100s of No 27 Sqn slaughtered in a disastrous
bombing misson to Havricourt Wood on 31 August, the other
three falling victim to Halberstadt and Fokker fighters of newly
formed Jasta 1.
Both Walfisch crewmen were awarded the Iron Cross, but on
6 September American war correspondent Herbert Bayard
Swope reported to the New York Times that they ‘were killed
trying to stop an English raiding party of eight aeroplanes that
flew over the German lines and were bombarding railroad
stations. The flight was at 5.30 Wednesday afternoon and
showed the exceptional courage of the Germans in taking on
a fight with such superior force’.
Fahlbusch and Rosenkrantz had encountered Sopwith 1½
Strutters of No 70 Sqn over Malincourt. Credit for their deaths
was shared between three crews, namely Capt William D S
Sanday and Lt Clifford W Busk, Lts Bernard P G Beanlands and
C A Good and Lts Selby and Thomas.