As the most advanced civilization in the known galaxy, the Galactic Republic has stood united for more than 21,000 years. Protected by the legendary Jedi Order, the Republic has defeated all its enemies, including the original Sith Empire in the Great Hyperspace War. Rising from the ashes of that defeat, however, and led by an unnaturally long-lived Dark Emperor, the Sith rebuilt and returned to exact their vengeance.
The Great War between Empire and Republic raged for years until a reprieve from constant conflict was defined in the Treaty of Coruscant. The tension between these two fundamentally opposed superpowers has not abated, though, and the return to war is widely considered to be inevitable. When that day comes, neutrality will not be an option. Everyone will be forced to choose which side they will give their allegiance to.