World War IX

International Allied Community

 * Atlantis (Empire of Atlantis) (ATL)
 * France (Kingdom of France) (FRA)
 * Great Britain (United Kingdom of Great Britain & Northern Ireland) (GBR)
 * Japan (Empire of Japan) (JPN)
 * Matora (Commonwealth of Matora) (MTR)
 * Sierra (Kingdom of Sierra) (SIE)
 * United States (United States of America) (USA)

Strategic Defense Coalition

 * China (People's Republic of China) (PRC) (before the Assassination of Tian Zhao)
 * Russia (Russian Federation) (RUS) (before the Assassination of Tian Zhao)

International Order of Socialist States

 * Soviet Union (Union of Soviet Socialist Republics (URS)

Neutral

 * Yugoslavia (Socialist Federal Republic of Yugoslavia) (YUG)