War council is a special action you can take to initiate a parley with enemies, allies, or other heroes. On your turn, if you call war council, the game mode switches from overworld play to downtime. Choose the party you'd like to have a conversation with, and then the GM will set the scene.
Resolving War Council
If you're calling war council as a form of military action (let's say you want to initiate diplomatic relations with a neutral faction but you can't reach the faction with your armies safely), then the GM may resolve your deliberations with an appropriate check that adjudicates diplomacy.