History of Orkney should continue to be observed in Orkney and Shetland. Thus the udal succession and mode of land tenure (that is, absolute freehold as distinguished from feudal tenure) lingered to some extent, and the remaining udallers held their lands and passed them on without written title. The islands cluster round the huge deep-water anchorage of Scapa Flow like a protecting hand, and in both World War I and World War II, the Royal Navy had a major base there, enabling them to challenge any attempt by German warships to emerge into the ocean through the Norwegian Sea. After the Armistice in
Atlantic U-boat campaign of World War I The other was the Battle of Ambos Nogales that was allegedly led by two German spies. On 20 October 1918 Germany suspends submarine warfare, and on 11 November 1918, World War I ended. The last task of the U-Boat Arm was in helping to quell the Wilhelmshaven mutiny, which had broken out when the High Seas Fleet was ordered to sea for a final, doomed sortie. After the Armistice, the remaining U-boats joined the High Seas Fleet in surrender, and were interned at Harwich. Of the 12.5 million tons of Allied shipping destroyed in World War I, over 8 million