Editing Space Marine Chapter Creation Tables (section)

==Chapter Origins==

{| border="1" cellspacing="0" cellpadding="5" align="center"
! colspan="2" |Why Was The Chapter Founded? (d10)
|- 
! 1-4
| Strategic Prognostication - "Our tarot cards say there's going to be a threat here, maybe. Found a Chapter!"
|-
! 5-6
| Counter - "There are Orks over here! Found a Chapter!" "But it'll take 50 ye-" "Do it!"
|-
! 7-8
| Standing Force - "This area doesn't have any Marines in it. Found a Chapter!"
|-
! style="white-space: nowrap;" | 9-10
| Crusade - "We need people running around and hitting the Imperium's enemies. Found a Chapter!"
|}


{| border="1" cellspacing="0" cellpadding="5" align="center"
! colspan="2" |When Was The Chapter Founded? (d100)
|- 
! 1
| Unsupported claim of [[Second Founding]] status, but definitely ancient. You can count this as Third Founding but with major connections to elder Great Crusade and Horus Heresy veterans forming the initial Chapter Council, with possibly some still being alive in Dreadnoughts to this day.
|-
! 2
| Late M31; Third Founding.
|-
!3-10
| Unknown
|-
! 11-15
| 32nd Millennium, War of the Beast and subsequent Fourth Founding.
|-
! 16-20
| 33rd Millennium
|-
! 21-25
| 34th Millennium; 8th Founding (sometime mid-millennium) and 9th Founding (between M34 and M35)
|-
! 26-30
| M35; 9th Founding, 10th Founding, 11th Founding, 12th Founding and 13th ("[[Thirteenth Founding|Dark]]") Founding, which is called that since the Imperium lost all data regarding the chapters created at this time, save for the fact that the [[Exorcists]], the [[Death Spectres]] and the Crimson Sabres who went traitor and became the [[Crimson Slaughter]] are from this founding. It may also have spilled over into the 36th Millennium.
|-
! 31-40
| M35; 14th-20th Founding <!-- Seriously, there were nine foundings just during M35. [[Derp]]. -->, these foundings were the greatest wave of foundings in history, with an astonishing nine foundings in the same millennium, even excluding the 9th, 10th, 11th, 12th, 13th and the following one.
|-
! 41-50
| 991.M35; 21st ("[[Cursed Founding|Cursed]]") Founding, this chapter be fucked. This was the individually largest founding of Firstborn Astartes, but only handfuls of loyalist Chapters survive.
|-
! 51-55
| 36th Millennium
|-
<!-- let's conveniently ignore the fact that there's only one Founding available between 991.M35 and "early M38". [[Derp]]. -->
! 56-60
| 37th Millennium 
|-
! 61-66
| M38; 23rd ("Sentinel") Founding
|-
! 67-72
| 39th Millennium; 24th Founding
|-
! 73-78
| 40th Millennium; 25th ("Bastion") Founding
|-
! 79-84
| 41st Millennium; 26th Founding
|-
! style="white-space: nowrap;" | 85-100
| M41/M42; [[Ultima Founding]] consisting of [[Primaris Marines]]. Actually in two waves (+ intermittents inbetween), first in 999.M41 and 000.M42, intermittent foundings during the intervening years to replace destroyed chapters or garrison key areas, and the second in 012.M42 after the first phase of the [[Indomitus Crusade]] ended with victory at the Battle of Raukos from the last core of [[Unnumbered Sons]] veterans, capping off the largest founding in history.
|}
If there's no founding listed in the millennium you rolled, go check which ones are available and pick the closest one to see what they are counted as being from, even if the founding was before or after the official timing. And remember that the Imperium routinely loses planets due to rounding errors, so your chapter not knowing exactly when it was founded is hardly out of step with the lore.

{| border="1" cellspacing="0" cellpadding="5" align="center"
! colspan="2" |Who was the Chapter's Progenitor? (d100)
|- 
! [[Rage|1-50]]
| [[Ultramarines]]
|-
! 51-65
| [[Blood Angels]]
|-
! 66-75
| [[Dark Angels]]
|-
! 76-80
| Traitor Legion or unknown
|-
! [[What|81-85]]
| [[Imperial Fists]]
|-
! 86-90
| [[White Scars]]
|-
! 91-94
| [[Raven Guard]]
|-
! style="white-space: nowrap;" | 95-98
| [[Iron Hands]]
|-
! 99
| [[Space Wolves]] (may reroll if not chimeric gene-seed or from Ultima Founding)
|-
! 100
| [[Salamanders]] (the Salamanders do not recognize any of their successors, though this doesn't apply to the Ultima Founding)
|}

Due to the Curse of the [[Wulfen]] the Sons of Russ are under a hard limit in canon, though you can do as you wish, possibly justifying by Chimeric gene seed fixing the worst problem at the cost of other issues. Or you can just make an Ultima Founding successor like the [[Wolfspear]]. The Dark Angels can not have any Chapters in the Fifth and Sixth Foundings, as the [[High Lords of Terra]] were explicitly avoiding to make any new ones at this time out of suspicions of Legion building.