- Commonwealth of Callisto
- Callisto (1,200,000 pop)
- Trojan Asteroids (3,500 pop)
- Greek Asteroids (1,600 pop)
- Sovereign Republic of Ganymede
- Ganymede (900,000 pop)
- Thebe (94,000 pop)
- Himalia (72,000 pop)
- Koronian Cluster (340 pop)
- Martian Trojan Belt (1,200 pop)
- Europan Consortium
- Europa (550,000 pop)
- Amalthea (20,000 pop)
- Ionian Combine
- Io (105,000 pop)
- Callisto and Ganymede (carbonates, silicates, metals and general industry)
- Europa (carbonates, hydrocarbons and a research technology economy)
- Io (silicates, fissiles and an energy economy)
- Open war between the Commonwealth of Callisto and the Sovereign Republic of Ganymede
- The Europan Consortium supports the Sovereign Republic of Ganymede.
- The Ionian Combine is engaged in raids and counter-raids with the Sovereign Republic of Ganymede, but also to a more limited extent with the Commonwealth of Callisto and the Europan Consortium as well.
- The Sovereign Republic of Ganymede also militarily supports the Republic of Titan and the Rhean Divisional Authority of Saturn.
- The Europan Consortium treats the Free State of Mars with contempt and has a very active commercial exchange with the Mars Republic proper.
- Jupiter possesses a brutal radiation field that engulfs Io and Europa, and to a lesser extent Ganymede. As a result, settlements on Io and Europa in particular are almost exclusively subterranean.
- Jupiter proper is a popular gravitational slingshot for spaceship navigation.