Game concept · All Under Heaven
Vassal Development
From the game's encyclopedia
Treasury sent to direct Vassals through their Liege, based on their tax contributions and other Obligations.
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.
Vassal Development is an entry of Crusader Kings III's in-game encyclopedia (All Under Heaven). The game explains it: "Treasury sent to direct Vassals through their Liege, based on their tax contributions and other Obligations." Patch 1.20.1.2, from game/common/game_concepts/tgp_game_concepts.txt and game/localization/english/game_concepts_l_english.yml.
Source: game/common/game_concepts/tgp_game_concepts.txt, game/localization/english/game_concepts_l_english.yml and the English localisation, Crusader Kings III 1.20.1.2.