Operation Collar was executed by No 11 Independent Company, a unit formed as part of Britain's early response to the German occupation of France in World War II. The raid targeted the coastal town of Port-en-Bessin, utilized primarily as a German supply route. The objective was to not only gather intelligence but also to demonstrate the resolve of British forces in the face of the Axis advance. Commanded by Captain Arnold Laurence, the raid was meticulously planned, with the commandos trained in skills enabling them to carry out such operations effectively.

The operation involved an intensive landing near the enemy-held beach, and its execution relied on the element of surprise and stealth. The troops landed at night to minimize confrontation. The commandos faced unexpected resistance but managed to achieve several key objectives, including gathering essential intelligence on German positions and strategies while inflicting damage on supply depots. This success highlighted the potential of commando-style operations and set a precedent for future raids throughout the war.

Following the mission, the British military recognized the value of specialized units like the commandos, leading to the expansion of similar forces in subsequent years. The tactics employed during Operation Collar would influence Allied military operations, leading to the establishment of more structured commando units used in various theaters of the war.