Battle of Ruuria

The Battle of Ruuria, also known as the Ruurian massacre, was, to put it simply, a decimation of the Ruurian race.

Once on Ruuria the Sith found themselves stalled by the native Ruurians who, ironically, through their lack of resistance took longer to eliminate then they would have during a battle (although a small force of Alliance troopers were stationed on the planet).

Why the Sith invaded Ruuria was unknown until a few months later.