Core Triumvirate

The Core Triumvirate was a major galactic government during the Second Galactic Civil War

History
The Core Triumvirate was formed from three planets: Kuat, Cato Neimoidia, and Byss, to combat the Mandalorian Federation's conquest for control of the galaxy.

The Second Galactic Civil War
The Core Triumvirate was one of the main combatants during the Second Galactic Civil War. They entered the war when the Federation attacked Kuat, in an attempt to sabotage ship-making for the Triumvirate.

Treaty with the Federation
Due to the looming Sith threat, the Triumvirate signed the Treaty of Peace with the Federation, officially ending the war, and founding the new Galactic Government.

The Sith Empire Crusades
In 106 ABY, the Triumvirate was attacked by the Sith Empire. After destroying their capital world, Byss, the Triumvirate fell into disarray. Eventually, it became part of the Sith Empire.