Greco-Turkish War (1919–1922)
The Greek campaign was launched primarily because the western Allies, particularly British Prime Minister David Lloyd George, had promised Greece territorial gains at the expense of the Ottoman Empire, recently defeated in World War I. The armed conflict started when the Greek forces landed in Smyrna (now Izmir), on 15 May 1919. They advanced inland and took control of the western and northwestern part of Anatolia, including the cities of Manisa, Balıkesir, Aydın, Kütahya, Bursa and Eskişehir. Their advance was checked at the Battle of Sakarya in 1921 by forces of the Turkish national movement. The Greek front collapsed with the Turkish counter-attack in August 1922, and the war effectively ended with the recapture of Smyrna by the Turkish forces and the Great Fire of Smyrna.
Hellenistic Greece
During the reign of Philip V of Macedon (r. 221-179 BC), the Macedonians not only lost the Cretan War (205-200 BC) to an alliance led by Rhodes, but their erstwhile alliance with Hannibal of Carthage also entangled them in the First and Second Macedonian War with ancient Rome. The perceived weakness of Macedonia in the aftermath of these conflicts encouraged Antiochus III the Great of the Seleucid Empire to invade mainland Greece, yet his defeat by the Romans at Thermopylae in 191 BC and Magnesia in 190 BC secured Rome's position as the leading military power in the region. Within roughly two decades after conquering Macedonia in 168 BC and Epirus in 167 BC, the Romans would eventually control the whole of Greece.