Constantine I of Greece
He was commander-in-chief of the Hellenic Army during the unsuccessful Greco-Turkish War of 1897 and led the Greek forces during the successful Balkan Wars of 1912–1913. He then led the Greek forces in Anatolia during the Greco-Turkish War of 1919-1922. His forces conquered much of western Asia Minor and reached the outskirts of Ankara but failed to take the city.