Siege of Theodosia
364 BCE.
Shown on the map at 45.049°, 35.379°.
The siege of Theodosia was a siege carried out by Leukon I sometime after his accession to the Bosporan throne in around 365 BC. Satyrus I, the father of Leukon, had previously laid siege on Theodosia but died during it. The exact numbers of the forces in the siege aren't known.
Text from the Wikipedia article Siege of Theodosia (c. 365 BC), licensed CC BY-SA 4.0.