Factions
The 109 factions you can play in patch 9.0, from the campaigns' start positions (start_pos_factions): 109 in Immortal Empires, 25 of them also in Realm of Chaos. Capitals are the Immortal Empires start.
Beastmen
Bretonnia
Chaos Dwarfs
Daemons of Chaos
Dark Elves
Dwarfs
Clan AngrundBelegar IronhammerZarakzil
Ironbrow's ExpeditionThorek IronbrowKarak Zorn
Karak KadrinUngrim IronfistKarak Kadrin
Karaz-a-KarakThorgrim GrudgebearerKaraz-a-Karak
Masters of InnovationMalakai MakaissonKraka Drak · also Realm of Chaos
The Ancestral ThrongGrombrindal – The White DwarfDrackla Spire
The Empire
Grand Cathay
Greenskins
High Elves
Khorne
Kislev
Lizardmen
Norsca
Nurgle
Ogre Kingdoms
Skaven
Slaanesh
Tomb Kings
Tzeentch
Undead Legions
Vampire Coast
Vampire Counts
Warriors of Chaos
Heralds of the TempestKholek Suneater
Host of the TripletsThe Glottkin
Legion of the GorequeenValkia the Bloodyalso Realm of Chaos
Puppets of MisruleVilitch the Curselingalso Realm of Chaos
Shadow LegionBe'lakor
The Decadent HostPrince Sigvald the Magnificent
The Ecstatic LegionsAzazelalso Realm of Chaos
The FecunditesFestus the LeechlordBrass Keep · also Realm of Chaos
Warhost of the ApocalypseArchaon the Everchosen