Novelleringen hänvisar till "Krig mot södra territorierna".
This was the army humanity had fronted in one of the worst wars of its entire checkered history—the War against the Southern Territories. It was largely because of this war, with its years of violence and astronomical numbers of casualties on both sides, that humanity had firmly rededicated itself to pursuing peace if at all possible. Peace bought with the bloodiest of prices, Okto-Bar remembered his father saying. He continued to read the list of ships and their captains.
Valerian and the City of a Thousand Planets: The Official Movie Novelization
Och själva filmen identifierar onda (över Mül) som " Arysum-Kormn "
The war against the Arysum-Kormn led to the destruction of Planet Mül.
Inget mer specifikt är annat än det mänskligheten vunnit, och var så upprörd av död och förstörelse att den sedan ägnade sig åt orsaken till galaktisk fred.