ARCHELAUS OF CAPPADOCIA (1st century B.c.) ; gen eral of Mithridates the Great in the war against Rome. In 87 B.C. he was sent to Greece with a large army and fleet, and occupied the Peiraeus after three days' fighting with Bruttius Sura, prefect of Macedonia. There he was besieged by Sulla, compelled to with draw into Boeotia, and completely defeated at Chaeroneia (86) . A fresh army was sent by Mithridates, but Archelaus was again defeated at Orchomenus (85). On the conclusion of peace, Arche laus, finding that he had incurred the suspicion of Mithridates, deserted to the Romans, by whom he was well received. Nothing further is known of him.