Leutnant Johannes Max Janzen (21 May 1886 – 18 October 1945) was a World War I flying ace credited with thirteen aerial victories.
He returned to Germany's military service during World War II, and died in a Russian prison camp on 18 October 1945.
[1] He trained with Fliegerersatz-Abteilung (Replacement Detachment) 3 until 22 August, then was forwarded to Kampfstaffel (Tactical Bomber Squadron) 12.
On 9 May, he survived being downed by Captain Oliver Colin LeBoutillier; Janzen's plane's controls had been shot away, but he spun harmlessly to the ground.
Two days later, his Fokker Dr.1's synchronization gear failed and Janzen shot off his own propeller while attacking a Spad.