391 BC
Year 391 BC was a year of the pre-Julian Roman calendar. At the time, it was known as the Year of the Tribunate of Flavus, Medullinus, Camerinus, Fusus, Mamercinus and Mamercinus (or, less frequently, year 363 Ab urbe condita). The denomination 391 BC for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.
Events
By place
Persian Empire
The Persian satrap, Struthas, pursues an anti-Spartan policy, prompting the Spartans to order their governor to the Greek cities of Ionia, Thibron, to attack him. Thibron successfully ravages Persian territory for a time, but is killed, along with a number of his men, when Struthas ambushes them.
Evagoras of Salamis and the Persians battle each other for control of Cyprus. Aided by the Athenians and the Egyptians, Evagoras extends his rule over the greater part of Cyprus and to several cities of Anatolia.
Greece
The Athenian general, Iphicrates, with a force composed almost entirely of light troops and peltasts (javelin throwers), wins a decisive victory against the Spartan regiment that has been stationed at Lechaeum in the Battle of Lechaeum. This is the first time that a force of light infantry defeats a unit of Greek hoplites.