Operation J V was a British Commando raid over the night of 11/12 April 1942, during the Second World War. It was carried out by two men Captain Gerald Montanaro, accompanied by Trooper

Trooper (rank)

Trooper from the French "troupier" is the equivalent rank to private in a regiment with a cavalry tradition in the British Army and many other Commonwealth armies, including those of Australia, Canada, South Africa and New Zealand. Today, most cavalry units operate in the armoured role, equipped...

 Preece of 101 (Folbot) Troop

Troop

A troop is a military unit, originally a small force of cavalry, subordinate to a squadron and headed by the troop leader. In many armies a troop is the equivalent unit to the infantry section or platoon...

, No. 6 Commando

No. 6 Commando

No. 6 Commando was a battalion-sized British Army commando unit of the Second World War. Although it was raised to conduct small-scale raids and harass garrisons along the coast of German-occupied France, it was mainly employed as a highly-trained infantry assault unit.Formed in July 1940, No...

. The two men paddled a two man canoe into Boulogne harbour, planted a limpet mine

Limpet mine

A limpet mine is a type of naval mine attached to a target by magnets; they are so named because of their superficial similarity to the limpet, a type of mollusk....

on a German tanker and withdrew unseen.