Global warming and the search for methods of combating its effects havesplit the United States, and the world, in two. In the east is theAtlantic Alliance, a staunch supporter and leading innovator ofcybernetic solutions to the world's problems. Their adversary is theRepublic of Pacifica and their Pacific Rim allies in the west. Theyadvocate adapting the human genome to cope with the changing world.Both factions are armed with a new type of tectonic technology thatallows armies to raise and lower defenses out of the earth at anylocation of their choosing.