(from the article `Cunaxa, Battle of`) ...massed his forces and marched inland from Sardis against his brother. The two armies met unexpectedly at Cunaxa, on the left bank of the Euphrates ... Found on http://www.britannica.com/eb/a-z/c/95
Clearchus was a Spartan general in the 5th century BC. His tyrannical rule of Byzantium resulted in his overthrow. He joined Cyrus' Persian army and assisted him against his brother. When Cyrus was killed at the battle of Cunaxa in 401 BC, Clearchus assumed command but was captured and killed by Artaxerxes. Found on http://www.probertencyclopaedia.com/browse/CXCA.HTM