The Estonian War of Independence, also known as the Estonian Liberation War, and War of Freedom in Estonia, was a defensive campaign of the Estonian Army and its allies, most notably the United Kingdom, against the Soviet Russian westward offensive of 1918–1919 and the 1919 aggression of the pro–German Baltische Landeswehr. The campaign was the struggle of the newly established democratic state of Estonia for independence in the aftermath of World War I. It resulted in a victory for Estonia and was concluded in the 1920 Treaty of Tartu.