- Dominators: The driving force behind the Alliance and the Invasion! of Earth and consequently the de facto leaders of the group.
- Khunds: A brutish race of humanoid warriors
- Thanagarians: Hawkman's people, now living under a fascist police state.
- Gil'Dishpan: An aquatic race of conquerors that live within hovering, armed and armored cybernetic shells.
- Durlans: A race of shapeshifters from the planet Durla.
- Daxamites: The seemingly mild-mannered humanoids who acquire Kryptonian-type abilities under a yellow sun, but are vulnerable when exposed to lead.
- Vegan star system
- Psions: A reptilian race of amoral scientists, the result of ancient experiments in genetic engineering by beings who would one day become the Guardians of the Universe.
- Warlords of Okaara: A race of warmasters and tacticians from the planet Okaara
- Citadelians: The twisted clone-race that comprised the armies of the Vega system.
The Alliance dissolved after their defeat by Earth's heroes.