The Action of 13 May 1942 was a naval engagement between the British Royal Navy and the German Kriegsmarine. It was an attempt by Royal Navy Motor Torpedo Boats (MTBs) to stop the German auxiliary cruiser Stier from reaching Gironde, France. Stier made it through the English Channel and reached Gironde, but MTBs sunk the German fleet torpedo boats Iltis and Seeadler. MTB 220 was sunk by the German ships.