First Balkan War: The day after the Battle of Sarantaporo, Greek troops liberate the city of Kozani.

The First Balkan War lasted from October 1912 to May 1913 and involved actions of the Balkan League against the Ottoman Empire. The Balkan states' combined armies overcame the initially numerically inferior and strategically disadvantaged Ottoman armies, achieving rapid success.

The Battle of Sarantaporo, also variously transliterated as Sarantaporon or Sarandaporon, took place on 9–10 October, 1912. It was the first major battle fought between Greek forces under Crown Prince Constantine and Ottoman forces under General Hasan Tahsin Pasha during the First Balkan War. The battle began when the Greek army attacked the Ottoman defensive line at the Sarantaporo pass, which connected Thessaly with central Macedonia.