Lycurgus of Sparta reforms were probably complete
In Sparta, the Messenian Wars resulted in the conquest of Messenia and the enserfment of the Messenians, beginning in the latter half of the 8th century BC. This was an unprecedented act in ancient Greece, which led to a social revolution in which the subjugated population of helots farmed and labored for Sparta, whilst every Spartan male citizen became a soldier of the Spartan Army permanently in arms. Rich and poor citizens alike were obliged to live and train as soldiers, equality which defused social conflict. These reforms, attributed to Lycurgus of Sparta, were probably complete by 650 BC.