While the series, and everything that happens within it, is fictional, the United States Space Force (USSF) is real. It is the sixth and most recent branch of the US Armed Forces, originally founded in September 1982 as a unit inside the Air Force that supported most of the country's military operations in space. In 2018, Trump revived a proposal to make the Air Force Space Command an independent space force, which was eventually signed into reality on Dec. 20, 2019.