The Phi Empire was created by Phi on Mechai (alt. Mekkai) after he was removed from the leading council. Phi soon used his army to take over Mechai and then branched out and took over numerous other planets.
The bulk of the Phi Empire is made of Phibots, boxy robots that are easy to manufacture. The rest of his army is made up of specialized robots such as Juggernauts and PhiAquas. Some basic Phibots recieve additional programming and are made captains (Navy) and Commanders (Army) as well as filling other special roles (PhiFlame and PhiFrost).