Today, Tomorrow, Forever. The United Nations Space Command (UNSC) is the Military, Scientific, and Exploratory body of the Unified Earth Government. Established in the 22nd century, the United Nations Space Command would serve as the first line of defense for Earth and humanity as a whole. To advance your civilian career, join the Unified Earth Government group. It may be found in the allies tab of this group. To enlist into the military, please attend a Basic Military Training (BMT).