Wartime Rank: Major Squadron:   III/JG 54 Victories: 166   164 on Eastern Front. Total Sorties: 600+ Theaters: Eastern Front Combat Debut: Spring 1940 Born: Feb. 8, 1912, Breslau Education: Königsberg Albertina University MIA: Aug. 7, 1944, near Dünaburg

In June 1941, after the attack on the Soviet Union, he accompanied I./JG 54 to the Eastern Front. In quick succession he achieved aerial victories, promotions and awards. In the beginning of August 1944, Ademeit was appointed acting Kommodore of JG 54.

On 7 August 1944, Ademeit, flying a Focke Wulf Fw 190 A-5 (Werksnummer 5960 — factory number) pursued a Russian Il-2 Sturmovik ground-attack aircraft eastwards over Russian lines near Dünaburg, however he failed to return from this mission and is considered Missing in action since.

He was posthumously promoted to Major.

Awards
– Ehrenpokal der Luftwaffe on December 8, 1941
– Front Flying Clasp of the Luftwaffe for fighter pilots in Gold and Penant
– German Cross in Gold on 25 February 1942 as Leutnant in the 1./JG 54
– Iron Cross (1939)
— 2nd Class (7 September 1940)
— 1st Class (5 September 1941)
– Knight's Cross of the Iron Cross with Oak Leaves
— Knight's Cross on 16 April 1943 as Leutnant (war officer) and pilot in the I./JG 54
— 414th Oak Leaves on 2 March 1944 as Hauptmann (war officer) and Gruppenkommandeur
    of the I./JG 54