Eumenes (/juːˈmɛniːz/; Ancient Greek: Εὐμένης; fl. 361–315 BC) was a Greek general, satrap, and Successor of Alexander the Great. He participated in the Wars of Alexander the Great, serving as Alexander's personal secretary and later on as a battlefield commander. Eumenes depicted himself as a lifelong loyalist of Alexander's dynasty and championed the cause of the Macedonian Argead royal house.
In the Wars of the Diadochi after Alexander's death, Eumenes initially supported the regent Perdiccas in the First Diadochi War, and later the Argead royalty in the Second Diadochi War. Despite less experience as a commander, Eumenes defeated Craterus, one of Alexander's most accomplished generals, at the Battle of the Hellespont in 321 BC. After Perdiccas' murder in 320 BC Eumenes became a public enemy of the new Post-Alexander regime under Antipater and Antigonus. In 319 BC he was defeated by Antigonus at the Battle of Orkynia and confined to Nora.