Greco-Turkish War: The First Battle of İnönü, the first battle of the war, begins near Eskişehir in Anatolia.

The Greco-Turkish War of 1919–1922 was fought between Greece and the Turkish National Movement during the partitioning of the Ottoman Empire in the aftermath of World War I, between 15 May 1919 and 14 October 1922. This conflict was a part of the Turkish War of Independence.

The First Battle of İnönü took place between 6 and 11 January 1921 near İnönü in Hüdavendigâr Vilayet during the Greco-Turkish War (1919–22), also known as the western front of the larger Turkish War of Independence. This was the first battle for the Army of the Grand National Assembly that was newly built standing army in place of irregular troops.

Eskişehir is a city in northwestern Turkey and the capital of the Eskişehir Province. The urban population of the city is 821 315, with a metropolitan population of 921 630.

Anatolia, also known as Asia Minor, is a peninsula in West Asia that makes up the majority of the land area of Turkey. It is the westernmost protrusion of Asia and is geographically bounded by the Mediterranean Sea to the south, the Aegean Sea to the west, the Turkish Straits to the northwest, and the Black Sea to the north. The eastern and southeastern limits have been expanded either to the entirety of Asiatic Turkey or to an imprecise line from the Black Sea to the Gulf of Alexandretta. Topographically, the Sea of Marmara connects the Black Sea with the Aegean Sea through the Bosporus and the Dardanelles, and separates Anatolia from Thrace in Southeast Europe.