United States Space Command (USSPACECOM) is a unified combatant command of the United States Department of Defense.
It was originally created in September 1985 to coordinate the use of outer space by the United States Armed Forces. The commander-in-chief of U.S. Space Command (CINCUSSPACECOM) also functioned as the commander-in-chief of the bi-national U.S.–Canadian North American Aerospace Defense Command (CINCNORAD), and for the majority of time during USSPACECOM's existence, was also the commander of Air Force Space Command.
The 2019 National Defense Authorization Act, which was signed into law in 2018, directed the reestablishment of U.S. Space Command as a sub-unified combatant command under U.S. Strategic Command. Instead, the Space Command was officially reestablished as a full unified combatant command on August 29, 2019.
U.S. Space Command's mission is to "deter aggression and conflict, defend U.S. and allied freedom of action, deliver space combat power for the Joint/Combined force, and develop joint warfighters to advance U.S. and allied interests in, from, and through the space domain.
The United States Space Force (USSF) is the space operations service branch of the U.S. Armed Forces, and is one of the eight U.S. uniformed services. It is the sixth branch of the U.S. military, and the first new armed service since the establishment of the independent U.S. Air Force in 1947.
It is organized as a military service branch within the Department of the Air Force, one of the three military departments within the Department of Defense. The Space Force, through the Department of the Air Force, is headed by the Secretary of the Air Force, who reports to the Secretary of Defense, and is appointed by the President with Senate confirmation. The most senior Space Force officer is the Chief of Space Operations, unless a Space Force officer also serves as either the chairman or vice chairman of the Joint Chiefs of Staff. The Chief of Space Operations exercises supervision over the Space Force's units and serve as one of the Joint Chiefs of Staff. Certain Space Force components will be assigned, as directed by the Secretary of Defense and Secretary of the Air Force, to unified combatant commands. Combatant commanders will be delegated operational authority of the forces assigned to them, while the Secretary of the Air Force and the Chief of Space Operations will retain administrative authority over their members.
As always, artworks featuring the insignia are available via my “Military Insignia” galleries from FineArt America and RedBubble.
To active duty or reserve military personnel, veterans and their family members: I grant an explicit permission to download the above images to be used for non-profit/non-commercial and charitable causes, benefiting troops and their families, as well as for non-commercial internal duty-specific purposes, such as unit website design, training materials and presentations.
The above information provided in part by Wikipedia, The Institute of Heraldry, Global Security, and the official websites of the corresponding units and formations.