It began in in 742.M41, when the Amerat Union Heretek Jagerdamen, led its Pirates and their allies, the Corsairs of the Cabal of the Bloody Libation, to Agusia. He did so in hopes of discovering an artefact of unholy power on the world, but the Pirates were betrayed by one of their own. The traitor revealed this information to Rogue Traders and a united fleet of more than a dozen Houses ambushed the Union and the Cabal. Both sides took heavy losses, but the Rogue Traders were eventually victorious. By the battle's end, the Union was destroyed and the Cabal's Corsairs scattered to the void.