Genao Massacre

The Genao Massacre was a mysterious campaign supposedly conducted by the Renegade Void Paladins Space Marine Chapter upon the Imperial world of Genao, although this incident is still under Inquisitorial investigation.

Background
Violent attack against imperial citizens on the planet Genao in the defense of Aeldari who had been captured by a chaos cult called the Cult of the Dark Millennium that was trying to open a portal to the warp so daemons could destroy the planet on the eve of the new millenium. Since the public didn't know about the cult all they saw and reported was the Void Paladins attacking from orbit and killing hundreds of loyalist arbites and PDF as well as dozens of innocents inside a mansion. Currently the event is under Inquisitional investigation due to what was found within that mansion, and there is no explanation for why several dozen eldar were seen being carefully removed from the mansion, even at the cost of one of their own defending them, and loaded onto a Stormbird before disappearing into the void.