The Suppression of the Macharian Heresy was a notable Imperial military campaign conducted by the notoriously savage Minotaurs Space Marine Chapter following the death of Lord Commander Solar Macharius in 400.M41 and lasting until approximately 470.M41. After the death of Macharius, those great demesnes that he had conquered for the Imperium of Man during the Macharian Crusade fell into open civil war and anarchy between his seven former Imperial Guard Army Group generals throughout the newly-conquered territories. These contested territories splintered into petty star empires, each lorded over by one of Macharius' old generals who had repudiated their oaths of loyalty to the Imperium, opposing each other as well as the authority of the Adeptus Terra, and with Space Marine Chapters now dra