The Great Offensive (Turkish: Büyük Taarruz) was the largest and final military operation of the Turkish War of Independence, fought between the Turkish Armed Forces loyal to the government of the Grand National Assembly of Turkey and the Kingdom of Greece, during the Greco-Turkish War. The offensive began on 26 August 1922 with the Battle of Dumlupınar, and Turkish troops reached the sea on 9 September with the recapture of İzmir. It ended on 18 September 1922 with the liberation of Erdek and Biga. The Turks amassed around 104,000 men, the largest number since the beginning of the war, to begin the offensive on 26 August and drive the Greek army of over 200,000 men out of western Anatolia. A pursuit operation began on a 400-kilometre-wide (250-mile) front.