Game concept
Convince De Jure Territory
From the game's encyclopedia
A Councillor Task performed by the Steward. It targets a De Jure County of the councillor's Liege that is owned by an Independent Ruler. When the county is persuaded, they will ask their Ruler to release them to their De Jure Liege.
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.
Convince De Jure Territory is an entry of Crusader Kings III's in-game encyclopedia. The game explains it: "A Councillor Task performed by the Steward." It is part of Councillor Task. Patch 1.20.1.2, from game/common/game_concepts/00_game_concepts.txt and game/localization/english/game_concepts_l_english.yml.
Source: game/common/game_concepts/00_game_concepts.txt, game/localization/english/game_concepts_l_english.yml and the English localisation, Crusader Kings III 1.20.1.2.