The Suicide Wars were a series of civil wars fought within the Foitani Empire over 30,000 years ago. They were fought between kwopillot and vodranet. The result of the wars was the destruction of the species' massive empire, the complete destruction of the kwopillot (except for at least one unit kept in suspended animation for millennia), and the destruction of most vodranet. However, thirty vodran worlds survived, and were plunged into dark ages in which they lost all knowledge of the Imperial-era history and of the true nature of Foitan physiology.
Eventually, six of the thirty colonies produced civilizations which returned to interstellar space.