Boralis was the heavily fortified capital city of Braxis. It was an early target for the United Earth Directorate in their invasion of the Koprulu Sector. Courtesy of Samir Duran however, the UED forces were able to enter the city through its unprotected 'back door' and capture it.
Files extracted from Boralis were used to analyze Dominion weaknesses, aiding in plotting an assassination attempt on Arcturus Mengsk and in selecting targets such as the Dylarian Shipyards.
In the Warcraft game series, Boralus is the capital of the human kingdom Kul Tiras.