Great Universal War

The Great Universal War the largest war in galactic history, and was between three galaxies. It started in 300 ABY, when the Yuuzhan Vong and the Ssi-Ruuk attacked from their galaxies. They first attacked Outer Rim worlds, and the Galactic Congress sent out droid forces to fight off the enemy, along with human and other species soldiers. Over 600 billion soldiers and 800 billion droids were mobilized against the threat into the Outer Rim.