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The Ring Builder Empire, also referred to as the alien empire, was a vast interstellar empire that spanned a great portion of the Milky Way galaxy. Established by the Ring Builders more than two billion years prior, the colonial empire encompassed millions of fertile star systems at its apogee,[1] likely being the dominant power in the galaxy up until its dissolution circa 1.5 - 2,000,000,000 BCE.

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