Strike by Night: To Take Caen, The Allies Must First Deal With The German Master Strategist SS General Heinrich Reichenbacher. In Desperation They Send In Force Twelve 

The invasion of France has gone well, but now the stubborn resistance of Caen holds up the Allied advance. A team of British Commandos are called upon to carry out a dangerous mission behind enemy lines to break the deadlock. Once the operation is completed, they must fight their way back to the Allied lines.