The strong mountain fortress of Salmenikon, located between Patras and Aigio, was defended by Graitzas Palaiologos. Graitzas rejected the sultan's call to surrender. Mehmed II subjected the fortress to artillery bombardment, but it proved ineffective. The Janissaries’ assaults on the walls also failed. However, after a seven-day siege, when the water supplies were cut off, the Greeks and Albanians living in the lower part of the town surrendered. Six thousand captives were taken; the sultan kept the young men for himself, and the rest were distributed among his officers. Yet the fortress itself had still not fallen. Graitzas declared that he would surrender only if the sultan withdrew. Mehmed accepted this condition and returned to Aigio, leaving the battlefield to Hamza Zenebisi. Graitzas, however, did not trust the promises given by the Turks. To test Hamza, he sent a small part of the garrison outside. Hamza immediately attacked the men and seized their possessions. As a result, Graitzas refused to surrender in any manner.[3]
Zagan Pasha was reappointed as a sanjak-bey, but Salmenikon continued to resist. The heroic commander of the fortress finally surrendered only after a siege that lasted one year. He was, however, allowed to withdraw to Venetian territory. Graitzas inspired respect even among his enemies; it is said that Mahmud Pasha exclaimed, “I saw many slavish souls in the Morea, but he was a true man.” [4]
The members of the fortress garrison were also allowed to depart freely to Venetian territory. During this campaign, Mehmed II captured around 360 fortresses in the Morea. Wherever the Ottoman army advanced, the population was brought under submission.[5]