CK3 DatabaseCrusader Kings III · 1.20.0.3 “Crozier” · unofficial

Casus belli · Event wars

Assassin Dissolution

Assassin Dissolution is a casus belli in Crusader Kings III (event wars). If the attacker wins: … is destroyed and the defender's Vassals become Independent. If the defender wins: The defender Imprisons the attacker, and gains a Title Revocation Reason. The war goal is worth 80% war score. Patch 1.20.0.3, from game/common/casus_belli_types/07_ep3_wars.txt.

Quick answers (2)
What do you get for winning a Assassin Dissolution war in CK3?
… is destroyed and the defender's Vassals become Independent (patch 1.20.0.3).
What happens on a white peace?
The attacker remain a Vassal of the defender.

How the war ends

Attacker wins

… is destroyed and the defender's Vassals become Independent.

White peace

The attacker remain a Vassal of the defender.

Defender wins

The defender Imprisons the attacker, and gains a Title Revocation Reason.

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The … has ended: it was no longer valid to continue.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

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

As written in game/common/casus_belli_types/07_ep3_wars.txt.

Source: game/common/casus_belli_types/07_ep3_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.