Aschen Confederation
An alliance of Aschen-occupied planets. Earth nearly joined this alliance in 2001. The Aschen invite newly-discovered worlds into their confederation and share their advanced technology, only to gradually eliminate the population and use the member world for their own purposes. The planet Volia, for example, was transformed from a thriving metropolis into sparsely-populated farmland in just a few generations.
In an averted timeline, Earth had joined this confederation, and learned a decade later that the Aschen were slowly wiping out Earth's population by radically reducing the planet's birthrate.
KEY EPISODES
2010 - Earth has joined the Aschen Confederation and, after a decade, begin seeing the negative effects of the alliance.
2001 - Earth is offered a seat in the Aschen Confederation, but soon discovers that the Aschen are a hostile species bent on subtle conquest.