Atlantis

Atlantis was the capital of the North Atlantic Confederacy from 2034 to the 2148 (the NAC was named the Gaeic Confederacy from 2141 to 2148), after which the Gaeic Autocracy moved to Ares Fall.

Atlantis was an enormous floating city, originally anchored 150 km from the coast of Virginia, but later moved freely through the Atlantic Ocean.