The Second Purging of Lastrati occurred in 543.M36, as a part of the Athalor Crusade, under the command of Marshal Gervhart of the Black Templars Space Marine Chapter. During Lastrati's tumultuous past a sect known as the Divine Army had gained control of the unremarkable Hive World of Lastrati, located in the Ultima Segmentum. The Divine Army preached a doctrine of intolerance of those with even the slightest deviation from what their leaders viewed as the physical attributes of the perfect human being. They created genetically-tailored viruses that targetted particular traits, eradicating whole swathes of the population. When Imperial contact was re-established with this remote planet, only 2.5 million inhabitants were left of a world that had once boasted a population of 14 billion.