HMS "Bulldog" (H91) was a built for the Royal Navy (RN) from 1929 to 1931. Initially assigned to the Mediterranean Fleet, she was transferred to the Home Fleet in 1936. During the Spanish Civil War of 1936–1939, the ship spent considerable time in Spanish waters, enforcing the arms blockade imposed by Britain and France on both sides of the conflict. "Bulldog" saw service throughout World War II on convoy escort duty during the Battle of the Atlantic and in the Arctic. Her most notable actions were the capture of a complete Enigma machine and codebooks from the in 1941, and sinking another German submarine in 1944. The surrender of the German garrisons of the Channel Islands was signed on 9 May 1945 aboard "Bulldog". Surplus after the war, she was broken up for scrap in 1946.