Timeline of the Warhammer 40,000 Universe - Age of Redemption (ca. M37): The Age of Redemption marked the era when the Imperium recovered from the sins of apostasy in a rain of blood and tears. The Imperial Cult grew in zeal as never before. Heretic pyres burned night and day on a thousand Imperial worlds as the people of the Imperium sought to mortify their sins against the God-Emperor through the scourging of the flesh of others.Imperial Crusade after Imperial Crusade was launched by the Space Marines and other Imperial military forces to recapture the lost wealth of the Imperium and push back the hordes of the forces of Chaos, Orks and other alien threats to Humanity. This religious fervour eventually peaked in an orgy of fanatical devotion to crusading in the Emperor's name and thousands of worlds were left with inadequate defences as sector fleets of the Navis Imperialis, Adeptus Astartes Chapters and Astra Militarum regiments were drawn into longer and more terrible Redemption Crusades spurred on by this religious fanaticism.In 010.M37 the Wrath of the Chaos Sun fell upon the Imperium when the red giant star at the heart of the Maxil Beta System exploded in an expanding cloud of Warpflame. The inhabitants of every world for hundreds of light years were either mutated beyond recognition or possessed by the denizens of the Warp. In response, the High Lords of Terra ordered the mobilisation of whatever Imperial forces were close at hand. So it is that the Grey Knights were joined by a dozen other Chapters, countless Astra Militarum regiments and the nascent Orders Militant of the Adepta Sororitas. The resulting battle did much to heal the remaining wounds in the Imperial body politic that had been opened by Goge Vandire's treachery.In 020.M37, the High Lords of Terra, in their mercy, began a systematic and deadly purge within the ranks of the Adeptus Terra and on many worlds across the galaxy to ensure that such a corruption of faith as occurred during the Reign of Blood could never happen again. This became known as the Great Cull.Among the most devastating of the conflicts unleashed during the Age of Redemption were the Abyssal Crusade and the Occlusiad War. The Abyssal Crusade of 321.M37 began when Saint Basilius, a Living Saint of the Ecclesiarchy, found thirty Space Marine Chapters wanting in their devotion to the Emperor. The guilty embarked upon a crusade into the Eye of Terror to earn their salvation and purge those Human-settled worlds stolen from Mankind by the birth of the Dark Prince of Pleasure, Slaanesh.The Occlusiad War of 555.M37 started when the northwestern fringe of the galaxy was ravaged by the Heretics known as the Apostles of the Blind King, rogue Tech-priests who viewed the existence of Humanity as an utter affront to the Machine God. The Apostles had uncovered wondrous artefacts from the Age of Technology that made possible the transformation of ordinary stars into supernovae. The constellations of the galaxy were changed forever when the Apostles purged the outer Segmentum Obscurus of Human life using these weapons.War raged for a solar decade until the Navigator Joyre Macran discovered the palace-warship of the Blind King hidden in a fold of the Warp. Escaping with this crucial intelligence, Macran guided the Imperial Navy's Emperor-class Battleship Dominus Astra to the palace's location. The Blind King was killed and the genocide ended when the Dominus Astra's Lance batteries pierced the palace-warship's hull. Without his psychically-prescient leadership the Apostles of the Blind King were swiftly overcome and their weapons hidden away in the deepest vaults of Mars.In 754.M37, on thousands of planets, menials rebelled against their dreary drudgery with wild-eyed leaders espousing a better way of life -- a galaxy of tolerance. The movement proved especially popular amongst the youth of the Imperium, earning it the title of the "Children's Crusade." Billions of earnest, young pilgrims are lured to seek transport to Holy Terra on pilgrimage; some are waylaid by pirates, but the majority disappear into the Warp. They became known collectively as the Lost Crusade.In 956.M37 the Heavenfall Massacres unfolded. Little else is known about them in Imperial records.