Operation Northern Guardian
Operation Northern Guardian was the allied garrison of Iceland, deployed on 31 January 2026 by the United Kingdom, France, and Norway at the invitation of the Icelandic government. It put two hundred Royal Marines, French naval fusiliers, a French SAMP/T battery, and six RAF Typhoons onto the Reykjanes peninsula, ending Iceland's post-Cold War demilitarised status overnight. It lasted nine days.
Deployment
The first RAF C-17 touched down at Keflavik at 06:40 in a squall of sleet. Within ninety minutes two RAF A400M Atlases and two French A400Ms out of Évreux-Fauville followed it onto Runway 01/19 and taxied into the military apron of the former American naval air station.
By midday, Giraffe AMB search radars and four transporter-erector-launchers of a French SAMP/T battery were deployed across the volcanic perimeter of the peninsula, phased arrays slewed west across the Denmark Strait. At 11:15 six Typhoon FGR4s of No. 1 (Fighter) Squadron arrived from Lossiemouth with Meteor and ASRAAM, and began continuous combat air patrols over the GIUK gap. Two Norwegian P-8A Poseidons staging from Evenes laid active sonobuoy barriers across the strait's acoustic choke points.
The decision in Reykjavik
The deployment was agreed in a five-hour emergency night session of the Alþingi. Iceland has no armed forces. With occupied Greenland seven hundred miles west, Prime Minister Kristrún Frostadóttir and Foreign Minister Þórdís Kolbrún Reykfjörð Gylfadóttir secured cross-party consensus on a Joint Defence Protocol with London, Paris, and Oslo.
"Iceland holds no armed forces of its own, but we will not allow our sovereign airspace and waters to become an unmonitored corridor for lawless aggression," Frostadóttir told the chamber at dawn. "Keflavik is restored to full defensive operational status. Our skies and shores are protected."
In London, Prime Minister Keir Starmer told the Commons: "The GIUK gap is not an abstract strategic concept — it is the direct maritime and air shield of the British Isles and Western Europe. We are locking the gate."
Effect on American planning
The garrison changed the geometry of the North Atlantic in a single morning. What Pentagon planners had treated as an open transit corridor became an armed sensor and missile bastion: any American movement east of Greenland would operate inside the engagement envelope of Aster 30 interceptors, land-based fighters, and dipping sonar screens.
The response was not to route around it. See Operation Northern Hinge.