Russian 1st Army (1914–1918)

Army · Russian Empire · July 30, 1914 – March 3, 1918

Paul von Rennenkampf's army, which invaded East Prussia from the east in 1914.

Recorded for World War I.

August 17, 1914 Invades East Prussia · map
August 20, 1914 Wins at Gumbinnen (Battle of Gumbinnen) · map
August 27, 1914 Advances slowly toward Königsberg · map
September 10, 1914 Driven out of East Prussia (First Battle of the Masurian Lakes) · map
September 20, 1914 – November 10, 1914 Behind the Niemen · map
November 20, 1914 Tries to cut off the Germans at Łódź (Battle of Łódź (1914)) · map
September 1, 1915 Holds the northern front after the Great Retreat (approximate) · map