In September 1941 and now a generalmajor,[Note 1] Apell was appointed commander of the newly raised 22nd Panzer Division.[1] Formed in France, much of the division's equipment was captured and foreign equipment with relatively few modern tanks. With its training completed, the division was transferred to the Eastern Front in February 1942. Apell led the division through the Battle of the Kerch Peninsula[5] until July 1942, when he became ill and was replaced.[1]
Not returned to his command upon recovering his health, Apell was placed in the Führerreserve (Leader's Reserve) until March 1943. He was made the Replacement Army Inspector in Vienna and, having received a promotion to generalleutnant,[Note 2] served in this role for the remainder of the war. He died in the village of Varnhalt, near Baden-Baden, on 7 March 1969.[1]
Mitcham, Samuel W. Jr. (2007). Panzer Legions: A Guide to the German Army Tank Divisions of WWII and Their Commanders. Mechanicsburg, PA, United States: Stackpole Books. ISBN978-0-8117-3353-3.
Scherzer, Veit (2007). Die Ritterkreuzträger 1939–1945 Die Inhaber des Ritterkreuzes des Eisernen Kreuzes 1939 von Heer, Luftwaffe, Kriegsmarine, Waffen-SS, Volkssturm sowie mit Deutschland verbündeter Streitkräfte nach den Unterlagen des Bundesarchives [The Wearers of the Knight's Cross 1939–1945 The Holders of the Knight's Cross of the Iron Cross 1939 by Army, Air Force, Navy, Waffen-SS, Volkssturm and Forces Allied with Germany, According to the Documents of the Federal Archives] (in German). Jena, Germany: Scherzers Militaer-Verlag. ISBN978-3-938845-17-2.