Game concept
Title Men-at-Arms
From the game's encyclopedia
Title Men-at-Arms are Men-at-Arms that exists for a given Title. Instead of being personally owned by the Ruler, these troops always follow the Title they belong to. Meaning that whomever owns the Title will also own and control the corresponding troops.
Title Men-at-Arms are used by certain Government Forms, such as Administrative.
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.
Title Men-at-Arms is an entry of Crusader Kings III's in-game encyclopedia. The game explains it: "Title Men-at-Arms are Men-at-Arms that exists for a given Title." It is part of Soldiers. Patch 1.20.1.2, from game/common/game_concepts/07_ep3_game_concepts.txt and game/localization/english/game_concepts_l_english.yml.
Source: game/common/game_concepts/07_ep3_game_concepts.txt, game/localization/english/game_concepts_l_english.yml and the English localisation, Crusader Kings III 1.20.1.2.