Renegade Space Marine Chapter Creation Table

Chapter Origins

Who was the Chapter's Progenitor? (d100)
1-30	Ultramarines
31-45	Blood Angels
46–55	Dark Angels
56-60	Traitor Legion or unknown
61-68	Imperial Fists
69-78	Reroll, choose a successor chapter from that chapter
79-86	White Scars
87–94	Raven Guard
95-98	Iron Hands
99	Space Wolves
100	Salamanders

When Was The Chapter Founded? (d100)
1	31st Millennium (the Chapter claims to be a Second Founding) (If rolled Traitor Legion, this must be taken by default.)
2–5	32nd Millennium
6–10	33rd Millennium
11–20	34th Millennium
21–30	35th Millennium
31–40	36th Millennium (Cursed Founding, this Chapter be fucked)
41–50	37th Millennium
51–60	38th Millenium
61–70	39th Millenium
71–80	40th Millenium
81–95	41st Millenium (Twenty-Sixth and last known Founding)
96–100	Unknown

Imperial Exodus (1d100) Causes
1-25	Altruistic Downfall: They came to blows with the Imperial Inquisiton for their actions regarding the civilians of a world attacked by the forces of chaos.
26-45	Chaos Use: They somehow came to discover the power of Chaos tainted weapons, and began using such artifacts. It was not long before they were driven out.
46-60	Bitter Resentment: The chapter(s) were plagued by mutations, and became fed up with the treatment of their Chapter(s) by other forces of the Imperium, and chose to strike off on their owned.
61-80	Political Suicide: After discovering the taint of chaos within an Imperial institution they attempted to purge it, but failed and were instead declared traitors themselves, forced to flee from their former allies
81-90	Destiny: The seeds of their leaving the Imperium were implanted long ago, be it by their founders or another institution, this was always going to happen...
91-100	Cult of Personality: A single Champion within the Chapter(s) whose philosophy and ideals have lead the marines down their own path.