The realm in House of the Dragon is split between the Greens and the Blacks, but how did this terminology come into being?

House Of The ... Addam (unless the dragon ate him and found another rider soon after, which seems unlikely) but the Queen has no inkling of who it could be and assumes the Greens stole this ...

but we won't do that here), all signs point to all-out war in "House of the Dragon" season 3. Both the Greens and Blacks spent season 2 attempting to bolster their forces in one way or another ...