He was in his younger years a pilot and observer. 
Serving in the Kasta 18, the Kogohl 3, 
and later in Bosta 17, and flew in several bombing raids over England with their Gotha G.V 
. The Gotha G.V was a long-range heavy bomber used by the Luftstreitkräfte (Imperial German Air Service) 
, under command of General Ernst von Hoeppner 
This bomber was agile for its size and difficult to shoot down, but because of its large size, and its unexceptional engine power, it demanded high skill from pilots during takeoffs and landings. The Gotha G. Vs were principally used as night bombers, and dropped 83 tons of bombs over England. The armament of the Gotha were: Guns: 2 or 3 × 7.92 mm (.312 in) Parabellum MG 14 machine guns and Bombs: 14 × 25 kg (60 lb.) bombsAschoff also wrote a book about the campaign, “London flüge 1917″. “Flights over London”,
Der Kampf des ersten Englandgeschwaders, the fight of the first England squadron. Aschoff served as an Oberleutnant in the Reichsluftfahrtministerium in Berlin
Death and burial ground of Aschoff, Walter.
At the end of the war he after a crash with his plane 
he landed in Belgium prison and died their at the age of 53, on 14-01-1946. He is buried on the large, 39.000 graves, cemetery of Kriegsgräberstätte, Lommel in Belgium, the largest German cemetery in Europe. 
Most graves are victims of the Battle of the Bulge and battles around Aachen and Düren in Germany. His close neighbours are the Generalmajor der Infanterie, Kommandeur Infanterie-Regiment 530, Heinrich Wittkopf, Generalmajor der Kavallerie, Konrad von Czettritz und Neuhaus, Generlarzt der Wehrmacht, Dr. Wilhelm Dietrich, the Vice Admiral, Robin Schall-Emden, the SS Obergruppenführer, Kommandeur Fallschirm Jäger Regiment 9, Friedrich “Fritz” Alpers 
and the brother of the Flying Ace, General der Flieger, Kommodore Jagd Geschwader 26 “Schlageter”, Adolf “Dolfo” Galland
Major and flyer ace, 
