CK3 DatabaseCrusader Kings III · 1.20.0.3 “Crozier” · unofficial

Casus belli · Migration

Migration War

Migration War is a casus belli in Crusader Kings III (migration). If the attacker wins: The attacker migrates to the contested Title. If the defender wins: The defender stays in the contested Title. The war goal is worth 80% war score. Patch 1.20.0.3, from game/common/casus_belli_types/09_mpo_wars.txt.

Quick answers (2)
What do you get for winning a Migration War war in CK3?
The attacker migrates to the contested Title (patch 1.20.0.3).
What happens on a white peace?
The defender stays in the contested Title.

How the war ends

Attacker wins

The attacker migrates to the contested Title.

White peace

The defender stays in the contested Title

Defender wins

The defender stays in the contested Title

If the war becomes invalid

The defender is no longer Nomad Government

Who can declare it

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

Attacker (allowed_for_character) (1 line of game script)
government_has_flag = government_is_nomadic

As written in game/common/casus_belli_types/09_mpo_wars.txt.

When it can start (valid_to_start) (1 line of game script)
always = no

As written in game/common/casus_belli_types/09_mpo_wars.txt.

Source: game/common/casus_belli_types/09_mpo_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.