In 367 BC, Alexander carried out a massacre of the citizens of Scotussa. A fresh Theban expedition into Thessaly, under Epaminondas resulted, according to Plutarch, in a three-year truce and the release of prisoners, including Pelopidas. During the next three years, Alexander seemed to renew his attempts to subdue the states of Thessaly, especially Magnesia and Phthiotis, for upon the expiry of the truce, in 364 BC, they again applied to Thebes for protection from him. The Theban army under Pelopidas is said to have been dismayed by an eclipse on 13 July 364 BC, and Pelopidas, leaving the bulk of his army behind, entered Thessaly at the head of three hundred volunteer horsemen and some mercenaries. At Cynoscephalae, the Thebans defeated Alexander, but Pelopidas was killed. This was closely followed by another Theban victory under Malcites and Diogiton. Alexander was then forced to restore the conquered towns to the Thessalians, confine himself to Pherae, join the Boeotian League, and become a dependent ally of Thebes.