First Great Galactic War (VM)

"The Great Galactic War dragged on for decades. Thousands of Jedi and Sith were slain. Countless star systems were ravaged."
 * ―Jedi Master Gnost-Dural

The First Great Galactic War was devastating conflict between Galactic Republic and Sith Empire. The war was orchestrated by Sith Emperor centuries ago to take vengence on the Republic and Jedi Order. The was lasted for 28 years, starting in 3,681 BBY and ending in 3,653 BBY with signing of Treaty of Coruscant.