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            Congressional Research Service
              nform ing theagis ative debate sinee1914



Defense Primer: U.S. Space Command


December  4, 2024


U.S. Space Command  (USSPACECOM) is responsible   for
U.S. military operations in space. As a geographic
combatant command  (CCMD),  USSPACECOM receives
personnel and equipment from each of the military services
to execute its mission (see Figure 1). USSPACECOM is
distinct from, and complementary to, the United States
Space Force (USSF), which is an armed service under the
Department of the Air Force (DAF). For additional
background, see CRS In Focus IF12610, Defense Primer:
The United States Space Force.


USSPACECOM was initially   established in 1985. In 2002,
Congress approved a broad reorganization of the CCMDs to
facilitate DOD's shift in focus to counter-terrorism and
homeland  defense. This reorganization included the
disestablishment of USSPACECOM,   and its responsibilities
and assets were transferred to U.S. Strategic Command
(USSTRATCOM). Driven by the increase  in adversary
space and counter space capabilities, Congress, in the John
S. McCain National Defense Authorization Act for Fiscal
Year 2019 (FY2019  NDAA);  P.L. 115-232 §169,
reconstituted USSPACECOM as   a subordinate unified
command  under USSTRATCOM. In 2019, the   Trump
Administration elevated USSPACECOM to   a CCMD,
citing space's importance as avital warfighting domain.
Msson and Organ zat on
According to USSPACECOM, the command plans,
executes, and integrates military spacepower into multi-
domain global operations in order to deter aggression,
defend national interests, and when necessary, defeat
threats. The command is responsible for conducting space
operations, sensor management, satellite communications
management,  and trans-regional missile defense.
USSPACECOM's area of responsibility  (AOR) begins 62
miles above the Earth's surface (also known as the KdrmAn
Line), extending to the Moon and beyond (see Figure 2).
USSPACECOM, led by a four-star  general or admiral, is
headquartered at Peterson Space Force Base (SFB) in
Colorado. The current USSPACECOM commander is
USSF  General Stephen Whiting.
USSPACECOM is organized into   five subordinate service
component  commands  and two functional component
commands.  Approximately 1,700 personnel are directly
assigned to USSPACECOM headquarters.   About 18,000
joint force personnel are assigned to the command's seven
sub-components, which are based in six states.
Space Dornain Chalenges and Threats
Space is an increasingly contested domain. The People's
Republic of China (PRC), the Russian Federation, and other
adversaries have, or are developing, offensive space
capabilities. In its 2022 report on space security, the
Defense Intelligence Agency (DIA) provided an overview
of such capabilities, some of which are capable of harming
or interfering with DOD and U.S. commercial assets in all


orbits. These capabilities range from offensive cyber and
electronic warfare platforms to ground- and space-based
anti-satellite weapons.
Figure I. USSPACECOM Organizational Structure


      Service Component
         Comman,ds

    U.S. Army Spcoe and Missile
      Defense rCommand

    U.S. Navy Space Command


U.S. Marine Corps Forces Space Command


       Air Forces -Space


     U.S. Space Forces - Space


   U .S. Space Command

 Subordinate Unified Commands



    Combined   Joint Functional
    Joint Force     Component
  SpaceComponent     Command
    command     For Integrated
               Missile Defense




-' Dual-Hatted
  Commander


Source: DOD Media
USSPACECOM officials   have raised concerns about
adversarial space capabilities. In February 2024, General
Whiting testified to the Senate Armed Services Committee
(SASC)  that the PRC and Russia seek to exploit perceived
U.S. reliance on space systems through the development of
military counterspace capabilities aimed at severely
degrading U.S., allied, and partner space and terrestrial
systems. In May 2024, the Chairman of the House
Intelligence Committee expressed concerns about Russian
development of an on-orbit nuclear anti-satellite weapon.
For additional background, see CRS Insight IN12420, U.S.
Counterspace Capabilities and CRS In Focus IF11895,
Space as a Warfighting Domain: Issuesfor Congress.
DIA  has outlined PRC and Russian pursuit of legally
binding international space arms control agreements to curb
what Russia sees as U.S. strength in outer space.
Congress has oversight and accountability mechanisms
available to influence such international agreements. For
more information, see CRS Legal Sidebar LSB11049,
International Agreements (Part II): Examining Tools for
Congressional Influence Over International Instruments.
Potential       u    for  Congres
USSPACECOM Headquarters. Some Members have
reportedly stated that President-elect Donald Trump will
seek to move USSPACECOM's headquarters   from its
current location of Colorado Springs to Huntsville,
Alabama, perhaps using an executive order. In January
2021, the DAF selected Redstone Arsenal, in Huntsville,
AL, to be USSPACEOM's headquarters,  moving the new
command  from its provisional location at Peterson SFB in

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