The Battle of Vassilika was fought between Greek revolutionaries

Greeks

The Greeks, also known as the Hellenes , are a nation and ethnic group native to Greece, Cyprus and neighboring regions. They also form a significant diaspora, with Greek communities established around the world....

 and the Ottoman Empire

Ottoman Empire

The Ottoman EmpireIt was usually referred to as the "Ottoman Empire", the "Turkish Empire", the "Ottoman Caliphate" or more commonly "Turkey" by its contemporaries...

 during the Greek War of Independence

Greek War of Independence

The Greek War of Independence, also known as the Greek Revolution was a successful war of independence waged by the Greek revolutionaries between...

 on August 25, 1821, near Thermopylae

Thermopylae

Thermopylae is a location in Greece where a narrow coastal passage existed in antiquity. It derives its name from its hot sulphur springs. "Hot gates" is also "the place of hot springs and cavernous entrances to Hades"....

. The Greek insurgents managed to destroy an Ottoman

Military of the Ottoman Empire

The history of military of the Ottoman Empire can be divided in five main periods. The foundation era covers the years between 1300 and 1453 , the classical period covers the years between 1451 and 1606 , the reformation period covers the years between 1606 and 1826 ,...

 relief army on its way to the forces of Omar Vrioni in Attica, and captured the supplies and baggage.
800 Turks were killed and 220 captured. Greek trophies included 18 flags, 2 cannons, 800 horses. Turks retreated to Lamia, to the north of Thermopylae .

This victory prevented the Ottoman army in Attica and Evia to enter Peloponnese and deliver the Ottoman garrisons besieged by the Greeks.