Sith Order of Dantooine

Early History
The Sith Order of Dantooine was established by Darth Scarr in 617 ABY. It's base of operations was on Dantooine, but it had branches in other parts of the Galaxy as well. Darth Scarr first took control of Dantooine with the help of his Dark Jedi followers. The planet became a fortress-world for Scarr and his Empire. The Dantooine military was fully under the order's control. It became more powerful when they enlisted Shadowtroopers to their ranks. The Order was only truly opposed by the Jedi Order of Naboo. Tensions rose between the two groups. It finally boiled over after three Jedi were captured and killed. This was the sparking point for war.

War of Shadows
The Sith Order declared war on all Jedi in the galaxy. They believed the time was right and attacked the Jedi held planet of Malastare. The siege lasted 24 days when at last the Jedi surrendered and left the planet.