 An attack from 2 or more territories to a single enemy territory is called a 'Mass Invasion'.If two different players attack a territory that fails to defend them, then a 'Spoils of War' battle ensues at the end of the turn between the two armies who fought for the territory in question.A player may only move through one territory at a time when attacking, although each player is granted a 'Surge Attack', which can be used to thrust a designated number of soldiers from a newly acquired territory into a neighbouring one.