AE stands for Another Earth.
It is the primary governing body of the human race since the fall of Earth in around S.E.Y 130.
The AE maintains standing armies and navies as well as the Absolute Defense line.
Planets under its authority still have the rights to their own armed forces, self governance and a say in their own system, but the collective power of the AE military outweighs that of individual planets and the AE has a higher authority than planetary officials.
Many characters belong in the Another Earth organisation.