Sulla now headed north, seeking the fertile plains of Boeotia to supply his army. At the Battle of Chaeronea, Sulla inflicted severe casualties on Archelaus, who nevertheless retreated and continued to raid Greece with the Pontic fleet. Archelaus regrouped and attacked a second time at the Battle of Orchomenus in 85BC but was once again defeated and suffered heavy losses. As a result of the losses and the unrest they stirred in Asia Minor, as well as the presence of the Roman army now campaigning in Bithynia, Mithridates was forced to accept a peace deal. Mithridates and Sulla met in 85BC at Dardanus. Sulla decreed that Mithridates had to surrender Roman Asia and return Bithynia and Cappadocia to their former kings. He also had to pay 2,000 talents and provide ships. Mithridates would retain the rest of his holdings and become an ally of Rome.