The Federation is the original fulga government, and is comprised of the species’ biological population. They tend to keep to themselves, and do not seem particularly interested in expanding.
This primarily stems from their ongoing war with the High Ascendancy. They fear that spreading their forces out to guard new colonies would leave them vulnerable, as their superior numbers are the only thing that let’s them fight on par with their more advanced enemies.
The Federation will often receive help from other nations in defending itself from the Ascendancy. Notably, the terons and rai have helped them beat back incursions into their territory, and have led raids against known Ascendancy strongholds.