Great Scourging

The Great Scourging was a war started by a superintelligent AI, which influenced and dominated the minds of lesser machines. It began a massive revolution against mankind, taking humanity by surprise. The conflict nearly ended human civilization and devastated thousands of worlds, including the scorching of Eoria. In the end, the AI and it's rogue army of droids, androids and warmachines were finally defeated, and the superintelligence destroyed. However, it divided mankind to just their local systems, isolating humanity from each other for half a millennia.