CK3 DatabaseCrusader Kings III · 1.20.0.3 “Crozier” · unofficial

Casus belli · Celestial

Seize the Mandate of Heaven

Seize the Mandate of Heaven is a casus belli in Crusader Kings III (celestial). If the attacker wins: The attacker takes the defender's Primary Title and makes the defender a Vassal. If the defender wins: The defender keeps all their titles and remains independent. Declaring it costs piety and prestige. The war goal is worth 80% war score. Patch 1.20.0.3, from game/common/casus_belli_types/10_tgp_china_wars.txt.

Quick answers (3)
What do you get for winning a Seize the Mandate of Heaven war in CK3?
The attacker takes the defender's Primary Title and makes the defender a Vassal (patch 1.20.0.3).
What happens on a white peace?
The defender keeps all their titles and remains independent.
What does the Seize the Mandate of Heaven casus belli cost?
piety and prestige; the amount depends on the titles, claims and distance, worked out when you declare.

How the war ends

Attacker wins

The attacker takes the defender's Primary Title and makes the defender a Vassal.

White peace

The defender keeps all their titles and remains independent.

Defender wins

The defender keeps all their titles and remains independent.

If the war becomes invalid

The … has ended: the defender can no longer be subjugated.

Who can declare it

The game shows no text of its own for these conditions; the script is below.

Every celestial war (the group's allowed_for_character) (6 lines of game script)
herders_and_tributary_constraints = yes
pam_personal_pacifism_offensive_war_ban_trigger = yes
tgp_war_ban_civilian_ministers_trigger = yes
NOT = {
	government_has_flag = government_is_theocracy
}

As written in game/common/casus_belli_groups/00_casus_belli_groups.txt.

Attacker (allowed_for_character) (10 lines of game script)
is_independent_ruler = yes
any_neighboring_top_liege_realm_owner = {
	has_title = title:h_china
}
NAND = {
	is_ai = yes
	any_owned_story = {
		story_type = story_mongol_invasion
	}
}

As written in game/common/casus_belli_types/10_tgp_china_wars.txt.

Defender (allowed_against_character) (1 line of game script)
has_title = title:h_china

As written in game/common/casus_belli_types/10_tgp_china_wars.txt.

Cost to declare

Costs piety and prestige. The amount is worked out when you declare (by the titles targeted, claims, distance and more), so the script is shown as written:

Cost (99 lines of game script)
piety = {
	value = 0
	add = common_cb_impious_piety_cost
}
prestige = {
	add = {
		value = 2000
		desc = CB_BASE_COST
	}
	multiply = common_cb_prestige_cost_multiplier
	scope:defender = {
		if = {
			limit = {
				legitimacy_level < 5
			}
			multiply = {
				value = {
					switch = {
						trigger = scope:defender.legitimacy_level
						4 = {
							value = 0.9
						}
						3 = {
							value = 0.75
						}
						2 = {
							value = 0.6
						}
						1 = {
							value = 0.45
						}
						0 = {
							value = 0.3
						}
					}
				}
				desc = dynastic_cycle_hegemon_legitimacy_level_cost_desc
			}
		}
	}
	multiply = {
		value = {
			value = 0
			scope:attacker = {
				if = {
					limit = {
						has_legitimacy_flag = reduced_claim_cb_cost
					}
					add = 0.5
				}
				else_if = {
					limit = {
						has_legitimacy_flag = very_reduced_claim_cb_cost
					}
					add = 0.25
				}
				else_if = {
					limit = {
						has_legitimacy_flag = extra_reduced_claim_cb_cost
					}
					add = 0.15
				}
				else = {
					add = 1
				}
			}
		}
		desc = legitimacy_high_modifier_tt
	}
	multiply = {
		value = {
			value = 0
			scope:attacker = {
				if = {
					limit = {
						has_legitimacy_flag = massively_increased_claim_cb_cost
					}
					add = 2.5
				}
				else_if = {
					limit = {
						has_legitimacy_flag = very_increased_claim_cb_cost
					}
					add = 2
				}
				else_if = {
					limit = {
						has_legitimacy_flag = increased_claim_cb_cost
					}
					add = 1.5
				}
				else = {
					add = 1
				}
			}
		}
		desc = legitimacy_low_modifier_tt
	}
}

As written in game/common/casus_belli_types/10_tgp_china_wars.txt.

Source: game/common/casus_belli_types/10_tgp_china_wars.txt and the English localisation, Crusader Kings III 1.20.0.3. “The attacker”, “the defender” stand where the game names the character; “…” marks other words it fills in during play.