Sabato Lepore was a veteran Adeptus Astartes and Sergeant in the War Claws chapter. Due to the nature of the Wars Claws' operation, Lepore would be involved in many conflicts in his almost two centuries of life, combating almost every enemy Mankind knew of. He would help purge hundreds of worlds of heretical influence and xenos infestation. By 960.M41, Lepore led the Third Company's Fifth Squad and was placed in command of the detachment of War Claws dispatched to assist Imperial forces on the water world of Oseonus III, where he would be grievously wounded by the Chaos Lord Aahrgoth the Conqueror, saved only by the intervention of Captain Corradino Breda of the Aetherian Warriors chapter. Lepore would go on to lead the ever growing contingent of Marines his chapter would funnel into the growing conflict in what would become the Ulgroth Crusade.