During the post-Legacy era, the galaxy of Galactic Prime was invaded by the Slayer-Ork Horde, led by the Slayer leader known as the Slayer of Slayers. They menaced the rule of the Galactic Federation Triumvirate shortly after it was established after the overthrow of the version of the Galactic Empire ruled by Darth Kryat. The Horde under the Slayer of Slayers was composed of billions of Slayers and Orks and tens of thousands of starships. However, within five years, military forces led by Jedi and Mandalorians had turned the tide, and the Horde was almost totally destroyed.