The U.S. Space Force (USSF) is a new branch of the Armed Forces. It was established on December 20, 2019 with enactment of the Fiscal Year 2020 National Defense Authorization Act. 

The USSF is a military service that organizes, trains, and equips space forces in order to protect U.S. and allied interests in space and to provide space capabilities to the joint force. USSF responsibilities include developing military space professionals, acquiring military space systems, maturing the military doctrine for space power, and organizing space forces to present to our Combatant Commands.