# Pituffik Space Base **Domain:** Military Installations / Missile Warning / Space Surveillance **Doc Type:** Installation Node **Maturity:** Developing **Aliases:** Thule Air Base (until 2023) ## Definition **Pituffik Space Base, known as Thule Air Base until its renaming in April 2023, is the U.S. Space Force installation in northwestern [[wiki/Greenland|Greenland]] and the Department of Defense's northernmost base, supporting ballistic-missile warning, missile defense, and space surveillance.** It operates under the 1951 Defense of Greenland Agreement, amended by the [[wiki/2026 Greenland Security Agreement|2026 Greenland Security Agreement]]. ABC News reported about 150 U.S. personnel stationed there in September 2026. ## 2025–2026 Record Vice President JD Vance visited the base in March 2025; its commander was relieved in April 2025 after an internal message distancing the base from the administration's criticism of Denmark. The September 2026 agreement added defense areas at Narsarsuaq and Mestersvig, and President Trump tied the expanded posture to [[wiki/Golden Dome|Golden Dome]]. ## War With Empire Context [[articles/war with empire/Greenland and Freedom City|Greenland and Freedom City]] treats Pituffik's early-warning and space-surveillance geometry as the northern eye of Golden Dome and the physical anchor of U.S. practical sovereignty in Greenland. ## Relationships - **Governed by:** [[wiki/2026 Greenland Security Agreement|2026 Greenland Security Agreement]]. - **System role:** [[wiki/Golden Dome|Golden Dome]]; [[wiki/NORAD|NORAD]] warning. - **Source:** [[articles/war with empire/Greenland and Freedom City|Greenland and Freedom City]] in [[collections/War With Empire|War With Empire]]. ## Sources / Provenance - [Trump signs security agreement with Greenland and Denmark](https://abcnews.com/Politics/trump-sign-agreement-leaders-greenland-denmark-united-nations/story?id=136636071) (ABC News, September 2026). - [Pituffik Space Base](https://www.pituffik.spaceforce.mil/) (U.S. Space Force).