A series of military setbacks followed. In 1263 Michael sent men, including Seljuk mercenaries, to Morea with the goal of conquering the Principality of Achaea, but this expedition failed in a surprise rout at Prinitza. Later that year a mixed fleet of 48 imperial and Genoese ships was defeated by a smaller Venetian force at the Battle of Settepozzi. The following year, the imperial forces in Morea were again defeated at Makryplagi after the Seljuk mercenaries, who had not been paid, changed sides. The nadir of Michael's disasters came in the Spring of 1265, when an army of Tatars and Bulgars under Nogai Khan ravaging Thrace ambushed Michael Palaeologos when he was returning to Constantinople accompanied by only a few troops. Deserted by even his own officers, who fled to save their own lives, Michael was able to escape by crossing the Ganos Mountains and reaching the Marmora coast, where he happened upon two Latin ships. He quickly boarded the vessels, and two days later safely arrived at Constantinople. "Thus did Michael survive one of the narrowest escapes of his career," notes Geanakoplos.