The United Nations Space Command, more commonly known as UNSC, is the military, exploratory, and scientific agency of the Unified Earth Government. The UNSC formed halfway through the 22nd century as remnants of old cultural ideologies clashed for supremacy in the Piala Sol System and mainly oversaw United Nations military operations in space. The UNSC is now part of the Alliance of Nations to battle against the Covenant Empire of the Horde.