Turkish invasion of Armenia

The Turkish invasion of Armenia, also known as the Turkish–Armenian War and known in Turkey as the Eastern Front (Turkish: Doğu cephesi) of the Turkish War of Independence, was a conflict fought between the recently established First Republic of Armenia and the Turkish National Movement, following the signing of the Treaty of Sèvres in 1920. The treaty transferred vast portions of eastern Anatolia from the Ottoman Empire to Armenia, including the towns of Trabzon, Erzurum and Van.

Source: Wikipedia — Turkish invasion of Armenia (CC BY-SA 4.0)