In 1940, the situation was looking dim for the British. After the successful evacuation of the British Expeditionary Force from Dunkirk they were left alone to defend their island against the Nazi onslaught.

Winston Churchill knew he needed to strike back, but large military operations were out of the question at the time so he made another proposal to his staff.

Small units that  “must be prepared with specially trained troops of the hunter class who can develop a reign of terror down the enemy coast.”

One of those operations was Operation Musketoon: the raid against the German-held Glomfjord power plant in Norway, between 11–21 September 1942.