Leukon, ruler of the Bosporan Kingdom from 387 BCE, is noted in antiquity as a strategist and a disciplinarian.

In the writings of Aeneas Tacticus, How to Survive under Siege, he dismissed his guards who owed gambling debts, because their loyalty could be doubted during a city siege.

He continues the war of his father against Theodosia and Chersonesus with the goal of annexing all the Greek colonies in the Bosporus.

He also makes Sindike his vassal, and in an inscription from Nymphaion he is described as "archon of the Bosporus, Theodosia, all Sindike".

Theodosia (modern Feodosiya) is situated on the southern coast of the Crimean Peninsula on the western shores of Feodosiya Bay.

Originally called Ardabda by its natives, terra cottas show it to have been inhabited in the sixth century BCE, but it is first heard of in history as resisting the attacks of Satyrus, ruler of the Bosporan kingdom, or Cimmerian Bosporus, about 390 BCE.

His successor Leukon, who succeeds to the throne in 387 BCE, transforms it into a great port for shipping wheat to Greece, especially to Athens.