The planet Earth in the Old Universe is the traditional homeworld of Humans. Earth has dozens of Wormholes that connect it to various planets and moons in the Pocket Universe.

Around 9000 years ago (around Year 3100 according to the New Shi'ar Calendar), most of the nations of Earth united into two main governments:  the Pan-American Commonwealth (descended from the United States of America and most Western Hemisphere countries) and the Eurasian Republic (descended from the European Union, Russia, China, and most Asian countries).

In the present day (Year 12,100 according to the New Shi'ar Calendar), it is reported that humans on Earth currently face a war against a race of robots called Cylons.  This has caused the remnants of the governments of the Pan-American Commonwealth and the Eurasian Dominate to unite as the United Earth Regime.