sentences:  Leaving 200 men as a garrison, Londos then marched on Patras to join the siege of the city's fortress.On July 1822, at Akrata, a force of Greek fighters under Londos, Zaimis and Petimezas surrounded and attacked a group of 4,000 Turks marching to Patras after their defeat at the Battle of Dervenakia.Only a few were lucky to escape, while Yusuf Pasha sent ships to take them to Patras.