Commandos and Daring Landings: The Secrets of
Operation Claymore

In the freezing dawn of 4 March 1941, a small British raiding force stepped off their landing craft and onto Arctic ice, aiming for four fishing ports few outside Norway had ever heard of — and walked straight into one of the most quietly consequential raids of the entire war.

A Raid Built to Avoid a Fight

By early 1941, Norway had been under German occupation for less than a year, and the Lofoten Islands, far above the Arctic Circle, had become an unlikely industrial target. The region supplied roughly half of Norway's herring and cod oil, and the Germans were extracting glycerine from it — a key ingredient in high explosives, alongside vitamin supplements for troops stationed in the field. Destroying that supply chain, without triggering a pitched battle, became the whole point of the mission.

Combined Operations, the newly formed British command tasked with raiding occupied Europe, had spent months planning without a single major success to show for it. Claymore was as much a test of the concept itself as it was an attack on fish-oil factories — a chance to prove that raiding actually worked before larger operations were risked.

Ice, Surprise, and Four Norwegian Ports

The force sailed from Scotland on 1 March aboard the converted liners HMS Queen Emma and Princess Beatrix: men of No. 3 and No. 4 Commando, a Royal Engineers section, and Norwegian volunteers, escorted by the 6th Destroyer Flotilla. Two days later a German aircraft spotted them at sea — a moment that could have ended the mission before it began — yet the force pressed on regardless. By the time they reached Stamsund, Henningsvær, Svolvær, and Brettesnes, the ice had formed further out than expected, forcing the commandos to leave their boats early and cross it on foot toward the waterfront. They still caught the garrisons completely off guard.

None of the four landing groups met organized resistance. Demolition teams moved straight to the oil tanks and factory machinery while naval gunfire and boarding parties dealt with anything afloat in the harbors — a coordinated strike that left the islands' industrial capacity in ruins within hours.

The only British casualty of the entire raid was an officer who shot himself in the leg with his own revolver.

The Machine That Went Overboard

The raid's real prize wasn't on the objective list at all. Alongside the armed German trawler Krebs, sunk in the harbor at Svolvær, boarding parties recovered a set of Enigma rotor wheels and code books. The trawler's commander managed to throw his own Enigma machine overboard moments before he was killed in the exchange of fire — but the spare rotors and documents on board survived. Sent to Bletchley Park, they helped codebreakers read German naval traffic for weeks afterward, feeding intelligence that let Allied convoys steer clear of U-boat patrols.

A Small Raid With an Outsized Legacy

Operation Claymore never involved more than a few hundred men, met almost no resistance, and lasted barely a day on the ground. Yet it delivered exactly what Combined Operations needed in early 1941: proof that a small, well-trained force could strike deep into occupied territory, do real damage, and get out clean. For the Commandos themselves — many of whom had trained for a year without seeing action — it was the first sign their new branch of the army actually worked.

It also set the template for the raids that followed across occupied Europe: hit a target the enemy assumes is safe, move fast, and let the intelligence gathered along the way outlast the mission itself. Churchill himself later pointed to Claymore as evidence that raiding parties, properly used, could tie down German garrisons across occupied Norway for the rest of the war — forces Hitler could never fully commit elsewhere.