Game concept
Undirected Great Holy War
The game also links it as Undirected Great Holy Wars, Crusade, Crusades, Undirected.
From the game's encyclopedia
An Undirected Great Holy War is declared by a Spiritual Head of Faith with the intention of bringing a Kingdom under the rule of their Faith.
Undirected Great Holy Wars are not started immediately, instead they enter a Preparation Phase.
Before and during the war, rulers of the attacking Faith can choose to donate Gold to the War Chest.
If victorious, the targeted Kingdom will be taken and given to a character of the attacking Faith. Rewards for the attackers include Piety and potentially having their Dynasty become Landed within the conquered Kingdom.
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.
Undirected Great Holy War is an entry of Crusader Kings III's in-game encyclopedia. The game explains it: "An Undirected Great Holy War is declared by a Spiritual Head of Faith with the intention of bringing a Kingdom under the rule of their Faith." It is part of Great Holy War. The game also links it as Undirected Great Holy Wars, Crusade, Crusades and Undirected. 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.