CK3 DatabaseCrusader Kings III · 1.20.0.3 “Crozier” · unofficial

Casus belli · Civil wars and factions

Imperial Policy Faction

The war is called “Imperial Policy War”

Imperial Policy Faction is a casus belli in Crusader Kings III (civil wars and factions). If the attacker wins: The attacker will select a new Imperial Policy. If the defender wins: The defender imprisons every rebellious vassal and gains a Title Revocation Reason against each of them. The war goal is worth 80% war score. Patch 1.20.0.3, from game/common/casus_belli_types/10_tgp_faction_wars.txt.

Quick answers (2)
What do you get for winning a Imperial Policy Faction war in CK3?
The attacker will select a new Imperial Policy (patch 1.20.0.3).
What happens on a white peace?
The defender gets a truce and a Title Revocation Reason against all rebelling vassals.

How the war ends

Attacker wins

The attacker will select a new Imperial Policy

White peace

The defender gets a truce and a Title Revocation Reason against all rebelling vassals.

Defender wins

The defender imprisons every rebellious vassal and gains a Title Revocation Reason against each of them.

If the war becomes invalid

The … has ended: it was no longer valid to continue.

Who can declare it

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

Every civil wars and factions war (the group's allowed_for_character) (1 line of game script)
herders_and_tributary_constraints = yes

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

Attacker (allowed_for_character) (3 lines of game script)
scope:attacker = {
	is_leading_faction_type = imperial_policy_faction
}

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

Defender (allowed_against_character) (3 lines of game script)
scope:attacker = {
	liege = scope:defender
}

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

Source: game/common/casus_belli_types/10_tgp_faction_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.