In which country did Anton Ludwig August von Mackensen lead an Army Group from 1916-1918?
Army Group Mackensen (Romania) The Army Group Mackensen (German: "Heeresgruppe Mackensen") which operated against Romania between 28 August 1916 and 7 May 1918 during World War I under the command of Field Marshal Mackensen, was an Army Group of the German Army.
Battle of Stallupönen The Battle of Stallupönen, fought between Russian and German armies on August 17, 1914, was the opening battle of World War I on the Eastern Front. The Germans under the command of Hermann von François conducted a successful counterattack against four Russian infantry divisions from different infantry corps, which heavily outnumbered them but were separated from each other, creating a gap between the 27th Infantry Division and the 40th Infantry Division, and had little coordination with each other. It was a minor German success, but did little to upset the Russian timetable.