No 311 (Czechoslovak) Squadron RAF was a Czechoslovak-manned bomber squadron of the Royal Air Force in the Second World War. On 27 December 1943 Liberator BZ796/H, led by Plt Off Oldřich Doležal, attacked the German blockade runner Alsterufer in the Bay of Biscay. Doležal's crew set the cargo ship on fire with five RP's and a 500 lb (230 kg) bomb, and she sank the next day.
Operation Stonewall was a World War II operation to intercept blockade runners off the west coast of German-occupied France. It was an effective example of inter-service and international co-operation.