Game concept
Dominance
From the game's encyclopedia
Dominance represents the projected power of a Nomadic Ruler. It can be increased by Herd size and will unlock additional Migration options.
There are five different levels of Dominance: Unruly Nomads, Limited, High, Absolute and Unrestricted.
The last level can only ever be obtained by one ruler per playthrough.
The game's text for patch 1.20.1.2. Words in blue are entries of the encyclopedia: hover one to read it, as in the game.
Dominance is an entry of Crusader Kings III's in-game encyclopedia. The game explains it: "Dominance represents the projected power of a Nomadic Ruler." It is part of Government Authority. It covers Unruly Nomads, Limited, High, Absolute and Unrestricted. Patch 1.20.1.2, from game/common/game_concepts/mpo_game_concepts.txt and game/localization/english/game_concepts_l_english.yml.
Source: game/common/game_concepts/mpo_game_concepts.txt, game/localization/english/game_concepts_l_english.yml and the English localisation, Crusader Kings III 1.20.1.2.