House Trainor hails from the Knight World of Mancora, which is also the Space Marine Chapter Homeworld of the Howling Griffons Space Marine Chapter. The history of its days prior to the Chapter’s arrival is uncertain, those records long lost to the vagaries of time. Located within the Ultima Segmentum, Imperial records clearly indicate that the Chapter has deliberately and artificially prevented the world from advancing beyond a pre-industrial technological base. Though an uncharacteristic degree of covert operations and manipulations, the Howling Griffons have also kept the world's feudal city-states on a near-constant war footing, which has led to a culture that has a poor record of its own origins. This enables the Howling Griffons to select from a pure gene-stock of hardened warriors w