摘要：On 10 October 2025, UK Royal Marines wrapped up Exercise Arctic Tide in the fjords of Troms, a key strand of Tarassis, the largest

UK Royal Marines concluded Exercise Arctic Tide in northern Norway, refining cold-weather amphibious logistics with Norwegian forces. The effort strengthens rapid allied deployment options across NATO’s High North defense posture.

On 10 October 2025, UK Royal Marines wrapped up Exercise Arctic Tide in the fjords of Troms, a key strand of Tarassis, the largest Joint Expeditionary Force training to date, as reported by the Royal Navy. The ten-day serial brought together 40 Commando and Norwegian partners to rehearse covert insertions and, above all, the sustainment of raiding teams operating far inland using both traditional and uncrewed logistics. Running from early September to late October across the High North and Baltic, Tarassis mobilises thousands of personnel and dozens of platforms over land, sea, air, space and cyber under a UK framework. The relevance is direct: these drills validate rapid, scalable amphibious options that strengthen deterrence on NATO’s northern flank.This phase of Tarassis shows that amphibious credibility rests on sustainment as much as speed: by proving they can insert, protect and continuously resupply raiding forces in Arctic conditions while allied navies integrate in the Baltic, the UK Commando Force and partners signal a ready, layered deterrent for Northern Europe, one that can move first, stay in the fight, and open the door for larger formations when it matters (Picture source: Royal British Navy)

At sea and ashore, Arctic Tide stress-tested the full amphibious chain. RFA Lyme Bay served as the afloat hub for 350 sailors, marines and soldiers, projecting small Commando teams by raiding craft after long transits in sub-zero wind chill, then sustaining them with first- and second-line logistics across mountainous terrain. North Devon’s Commando Logistic Regiment used the window to mesh classic methods with uncrewed delivery to dispersed elements working deep behind notional enemy lines, while Royal Navy Coastal Forces patrol craft supported other Tarassis serials in the Baltic under allied command.

Operationally, the activity sits within the JEF construct, ten Northern European nations led by the UK to react quickly to regional threats, marking what organisers describe as a step change in scale and tempo. During Tarassis, Estonian commanders assumed control of UK P2000 patrol boats in Tallinn Bay to prove seamless integration, as amphibious forces in Norway prepared the way for larger allied landings by seizing and holding key littoral nodes. This rhythm of concurrent Baltic and Arctic strands underscores a JEF habit of operating forward, at speed, and in concert with NATO.

Strategically, the message is threefold. Geopolitically, credible amphibious access in Norway and across the High North complicates any adversary calculus from the Barents to the Baltic by assuring reinforcement routes and allied presence near critical sea lines and undersea infrastructure. Geostrategically, the JEF’s ability to launch distributed advance-force operations while Baltic partners command UK units in parallel demonstrates a mature, multi-node response that complements NATO rather than duplicating it. Militarily, the logistics focus, melding crewed and uncrewed sustainment at range, expands the endurance and reach of small teams, turning raiding actions into persistent effects generators instead of one-off strikes.

This phase of Tarassis shows that amphibious credibility rests on sustainment as much as speed: by proving they can insert, protect and continuously resupply raiding forces in Arctic conditions while allied navies integrate in the Baltic, the UK Commando Force and partners signal a ready, layered deterrent for Northern Europe, one that can move first, stay in the fight, and open the door for larger formations when it matters.

Written by Teoman S. Nicanci – Defense Analyst, Army Recognition Group

Teoman S. Nicanci holds degrees in Political Science, Comparative and International Politics, and International Relations and Diplomacy from leading Belgian universities, with research focused on Russian strategic behavior, defense technology, and modern warfare. He is a defense analyst at Army Recognition, specializing in the global defense industry, military armament, and emerging defense technologies.

来源：擎苍教育