Castor’s first major engagement as Apostle of the 10th: An all-out assault on the Imperial hive world of Samson IV at the fringes of the Hazeroth Abyss. Arguably not the most important or well-defended system in the Imperium, the Samson IV campaign was still a great undertaking. Planned and executed by Warleader Tam Caron: The campaign was ultimately quite successful, reaping a good bit of plunder and numerous slaves, as well as ruining much of Samson’s industrial capacity. It was also very costly; hundreds of Astartes dead and several Host vessels lost. Paved the ground for a major shakeup of the 10th’s chain of command and TOE.