Casus belli · De jure

Dismantle Pretender

Dismantle Pretender is a casus belli in Crusader Kings III (de jure). If the attacker wins: The Byzantine Empire is destroyed. All De Jure Byzantine vassal titles become a de jure part of the Roman Empire instead. If the defender wins: The Byzantine Empire remains intact. The Roman Empire must pay war reparations. The war goal is worth 90% war score. Patch 1.20.0.3, from game/common/casus_belli_types/00_dejure_war.txt.

Quick answers (2)

What do you get for winning a Dismantle Pretender war in CK3?: The Byzantine Empire is destroyed. All De Jure Byzantine vassal titles become a de jure part of the Roman Empire instead (patch 1.20.0.3).
What happens on a white peace?: There can be no white peace.

How the war ends

Attacker wins

The Byzantine Empire is destroyed. All De Jure Byzantine vassal titles become a de jure part of the Roman Empire instead.

White peace

There can be no white peace

Defender wins

The Byzantine Empire remains intact. The Roman Empire must pay war reparations.

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The … has ended: it was no longer valid to continue.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 de jure war (the group's allowed_for_character) (7 lines of game script)

herders_and_tributary_constraints = yes
pam_personal_pacifism_offensive_war_ban_trigger = yes
tgp_dynastic_cycle_offensive_wars_ban_trigger = yes
tgp_war_ban_all_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) (3 lines of game script)

scope:attacker = {
	has_character_flag = flag_emperor_challenging_byz
}

As written in game/common/casus_belli_types/00_dejure_war.txt.

Defender (allowed_against_character) (11 lines of game script)

NOR = {
	scope:defender = {
		target_is_liege_or_above = scope:attacker
	}
	scope:attacker = {
		target_is_liege_or_above = scope:defender
	}
	scope:attacker = {
		has_character_flag = flag_emperor_challenged_byz
	}
}

As written in game/common/casus_belli_types/00_dejure_war.txt.

When it can start (valid_to_start) (3 lines of game script)

scope:target = {
	this = title:e_byzantium
}

As written in game/common/casus_belli_types/00_dejure_war.txt.

Source: game/common/casus_belli_types/00_dejure_war.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.