1. At the end of the Battle Phase, the alliance that defeats all defending squads in the enemy's Strongholds first and reduces the enemy's Stronghold Stars to 0 wins.
2. If neither side reduces the enemy's Stronghold Stars to 0 by the end of the Battle Phase, the side with more remaining Stronghold Stars wins. If both sides have the same number of remaining Stronghold Stars, the side that reached that Star count later wins.
3. Special Case: If both sides have the same number of Stronghold Stars before the Battle Phase begins, and both sides still have the same number of Stars after the Battle Phase ends, then both sides lose.