ORDER OF BATTLE // -86 BCE
Siege of Athens
Estimated force strength by side, with confidence labels per surviving record.
Forces engaged
1 sides catalogued · combined 37,000–44,000 estimated
Roman Republic
37,000–44,000
Medium-confidence figure
Battle context
The Siege of Athens and Piraeus, conducted from autumn 87 BC to spring 86 BC, was a central engagement of the First Mithridatic War. Roman forces under Lucius Cornelius Sulla besieged both the city of Athens, held by the Athenian tyrant Aristion in alliance with Pontus, and the port of Piraeus, defended by the Pontic commander Archelaus. The dual siege targeted the principal urban and maritime strongholds of Pontic power in Greece, making its reduction essential to Roman control of the peninsula. Casualties attributed to the Pontic and allied side reached 400,000, a figure indicating the scale and intensity of the operation. The engagement directly pitted Roman Republican forces, numbering between 37,000 and 44,000, against a combined Greek and Pontic defense, reflecting the extent to which King Mithridates VI had succeeded in drawing Greek city-states into alliance against Rome. The fall of Athens and Piraeus effectively broke organized Pontic resistance in mainland Greece and set conditions for the subsequent campaign that would decide the war.
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