Question: In which country did Anton Ludwig August von Mackensen lead an Army Group from 1916-1918?
Sentence (from "Army Group Rupprecht of Bavaria"): The Army Group Rupprecht of Bavaria or Army Group A (German: "Heeresgruppe Kronprinz Rupprecht von Bayern") was an Army Group of the German Army, which operated on the Western Front under command of Rupprecht, Crown Prince of Bavaria , between 28 August 1916 and 11 November 1918 during World War I.
Relevant evidence: No