Game concept · All Under Heaven

Expansion Decree

The game also links it as Expansion.

Expansion Decree Law →

From the game's encyclopedia

The Expansion Decree dictate that all Subjects focus their efforts on expanding the Realm.

Increasing soldier count, military accommodations and supporting any eventual Wars directed by their Mandala Ruler is imperative.

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.

Expansion Decree is an entry of Crusader Kings III's in-game encyclopedia (All Under Heaven). The game explains it: "The Expansion Decree dictate that all Subjects focus their efforts on expanding the Realm." It is part of Mandala Decree. The game also links it as Expansion. Patch 1.20.1.2, from game/common/game_concepts/tgp_game_concepts.txt and game/localization/english/game_concepts_l_english.yml.

for a guide, post or blog

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.