Soon after the NOJ moved to its new location in year 217 the tension between NOJ and an opposing Sith force was increasing. The people living in and around the academy on Yavin IV grew tense and nervous. The NOJ recruited regiments of armoured troopers to keep the peace. Disturbances was quickly dealt with by the means of security systems and weapons. As the alerts queued up, many fled but most stayed and fortified. When the day came, ((20070726)), the Sith armada appeared out of hyperspace and immediately landed ground troops, mainly consisting of dark Jedi.
But the Jedi were ready and waiting. The Sith forces were utterly defeated and victory was quickly announced.