You are all part of the same crusade, with the imperial guard player characters and the sisters of battle player characters on the same ship and several other NPC ships filled with lil npc guardsmen, and a single ship carrying the space marines, and an inquisitor thrown in. Right now the space marines are on the ground fighting a battle with the guard and sisters of battle coming to back them up. Each force has its own objectives and whether they succeed or fail effects the other force's chances/situation. Does that help any?<br/>