Joint Task Force–Space Defense

The Joint Task Force–Space Defense (JTF–SD) was a joint task force and subordinate command of United States Space Command. It was responsible for executing control of space defense and space domain awareness units to protect and defend U.S. space capabilities.

Mission
Joint Task Force–Space Defense's mission was to "conduct, in unified action with mission partners, space superiority operations to deter aggression, defend U.S. and Allied interests, and defeat adversaries throughout the continuum of conflict."

Structure
Joint Task Force–Space Defense included:
 * Seal of the National Space Defense Center.png National Space Defense Center (NSDC), Schriever Space Force Base, Colorado

History
Joint Task Force–Space Defense was established immediately after the establishment of United States Space Command on August 29, 2019. A ceremony recognizing the establishment of the JTF–SD was held on October 21, 2019 at Schriever AFB.

JTF–SD was inactivated on 6 December 2023 with the activation of United States Space Forces – Space. On 8 January 2024, a ceremony was held to inactivate JTF–SD.