M25

Year	Event	Source
	The Dark Age of Technology ends, and the Age of Strife begins. Terra and all Human colonies are gradually isolated from each other by the powerful warp storms that suddenly begin to rage throughout the galaxy. Warp travel along with interstellar trade consequently becomes increasingly difficult until all but impossible. The interdependency of human planets eventually breaks down entirely. Several Human worlds, including Terra, dependent on trade to feed their enormous populations enter a long period of revolt, anarchy, and civil war due to famine. Some even regress to barbarity. The rate of mutation increases dramatically throughout all Human worlds. Isolationism leads to the development of Abhumans. Several alien races, especially the Orks, take advantage of the situation to raid and plunder many of the Human colonies. Other colonies are conquered or completely destroyed. Some worlds are dominated by Human psykers and other mutants only to fall prey to Warp creatures, as Daemons appear possessing and/or consuming the weak and inexperienced psykers. Amid the confusion and chaos, the STC systems and knowledge about them are largely lost. Humanity is gradually pushed to the brink of annihilation. This state continues until M30.	Space Marine by Ian Watson, White Dwarf 178 (UK) article The Titan Legions by Rick Priestley, Galaxy in Flames page 410 by Ben Counter
	Age of Isolation - Squat worlds are cut off. Formation of Leagues.	Warhammer 40,000: Compendium
	Horiax Treatise mentions genetic alteration techniques.	Codex: Space Marines (3rd Edition)

M24	Timeline	M26