During the war the Polish Navy in exile was supplemented with leased British ships, including two cruisers (&lt;a href="HMS%20Danae%20%28D44%29"&gt;HMS Danae/"ORP Conrad"&lt;/a&gt;, and &lt;a href="HMS%20Dragon%20%28D46%29"&gt;HMS Dragon/"ORP Dragon"&lt;/a&gt;), seven destroyers, three submarines, and a number of smaller fast-attack vessels. The Polish Navy fought alongside the Allied navies in Norway, the North Sea, the Atlantic and the Mediterranean, and aided in the escort of Atlantic and Arctic convoys, in which was lost in 1943. Polish naval vessels played a part in the sinking of the , and in the landings in Normandy during D-Day. During the course of the war, one cruiser, four destroyers, one minelayer, one torpedo boat, two submarines and some smaller vessels (gunboats, mine hunters etc.) were sunk; in total, twenty-six ships were lost, mostly in September 1939. In addition to participating in the sinking of "Bismarck", the Polish Navy sank an enemy destroyer and six other surface ships, two submarines and a number of merchant vessels.