Rulebook p.18 - Call to Battle wrote:
1. CALL TO BATTLE
Once you have declared your intent to Pillage that province, the other players have a chance to join the battle. Starting with the player to your left and going around in clockwise order, each player (including you) may, if they wish, move one of their figures from an adjacent province into an empty village in the province you are pillaging. Moving a figure in this way does not cost Rage, and even players with zero Rage can do it. (Note that Ships cannot be moved.) Once all villages in that province are occupied, or when no one else wishes to join in, the battle begins.