- Second World War (1939-1945)
- General der Kavallerie (Lieutenant-general)
- Kommandierender General III.Armeekorps (mot.) / Panzergruppe 1 / Heeresgruppe Süd
- Awarded on:
- July 27th, 1941
Awarded for the successes of his III. Armee-Korps (mot) during the opening rounds of Operation Barbarossa. Mackensen and his Korps distinguished themselves during the breaking of Soviet resistance near Wledzimierz, the tank battle west of Zalurce, the fighting at Luck and Festung Rowne, the crossing of the Horyn river, the penetration of the Stalin line and the capture of Zhitomir.