Here you go:
0 BU/0 AU: Formation of the Imperial Alliance.
2 AU: Universal adoption of the Sanguine Covenant within the Imperial Alliance.
37 AU: Third Protectorate-Dominion War begins.
41 AU: Third Protectorate-Dominion War ended by the Imperial Alliance.
60 AU: Meteor crash releases the Quickslaver contagion.
70 AU: Appearance of the Lawgiver.
80 AU: Unification of the Janus Horde.
85 AU: Fourth Protectorate-Dominion War.
87 AU: Emperor Desmond and Empress Abigail assassinated.
90 AU: Empress Mercy assassinated; chain of events leads to all four major powers withdrawing from the Imperial Alliance.
91 AU: Imperial Senate declares martial law and sends Imperial forces to subdue the splintering nations.
91 AU: Campaign play begins.