The Siege of Athens and Piraeus was a siege of the First Mithridatic War that took place from Autumn of 87 BC to the Spring and Summer of 86 BC. The battle was fought between the forces of the Roman Republic, commanded by Lucius Cornelius Sulla Felix on the one hand, and the forces of the Kingdom of Pontus and the Athenian City-State on the other. The Greek Pontian forces were commanded by Aristion and Archelaus.