The Second Battle of İnönü (Turkish: İkinci İnönü Muharebesi) was fought between 26 and 31 March 1921 near İnönü in present-day Eskişehir Province, Turkey during the Greco-Turkish War (1919–22), also known as the western front of the larger Turkish War of Independence. It marked a turning point in the Greco-Turkish War and the Turkish War of Independence of which it was a part, as Greek forces had previously been victorious over mostly irregular Turkish forces.