2nd Great Hyperspace war

"'Sir/..there..is...too many of them!!!' Republic pilot during the invasion of Corscuant "The 2nd Great Hyperspace war, also known as the Greatest war, and the War to end all wars. Was a conflict that took place a year after the formation of the Eternal Alliance,  the mysterious Hierarchy-Empire a empire formed by the dreaded Dreji a race of conquer war-like aliens from the unknown regions, launched a massive and merciless invasion of the known galaxy. The Eternal Alliance, Sith Empire, and Old Republic were all hit when the Dreji launched a series of blitzkrieg style attack on Republic, Alliance and Imperial worlds. They also destroyed Odessen and Zakuul using their motherships super laser cannon, and invaded and terrformed Corscuant renaming it "An'Ya'Na". The war lasted some 2510 years, and ended with the Hierarchy-Empire retreating back into deep space, and the Republic, Sith Empire, and Eternal Alliance severely weakened and crippled.

The war caused the deaths to tens of trillions of people, and deepened the rift between the Jedi and the people they serve. The Eternal Alliance and sith empire eventually collapsed and were absorbed by the Republic, after its reformation into the Galactic Republic.

The Dreji returned during the final days of the clone wars as the Resurgent Dreji Empire it later colonized and used the planet Iokath as its capital. For some odd reason the Galatiac Empire left the Dreji alone, and even made peace relations with the Dreji. Rumors it was done, to prevent another invasion as the Dreji have superior technology.