On November 1, 1917, a German warship was reported to have been sunk by a mine off the coast of Sweden. British naval forces, operating in the Cattegat, on November 3, 1917, sank a German auxiliary cruiser and ten German patrol vessels. On November 17, 1917, during an engagement off Helgoland one German light cruiser was sunk and another damaged.
A German submarine, during November, 1917, attacked British naval forces, cooperating with the British expeditionary force in Palestine and sank one destroyer and one monitor.
On November 22, 1917, it was announced that the German Government had included in its "barred zone" waters around the Azores and the channel hitherto left open in the Mediterranean to reach Greece, and had extended the limits of the zone around England.
On November 29, 1917, a German torpedo boat struck a mine off the coast of Belgium and sank, all of her crew with the exception of two being lost.
During the night of December 9-10, 1917, Italian naval forces entered the harbor of Trieste and successfully torpedoed the Austrian battleship _Wien_, which sank almost immediately.
A German submarine bombarded on December 12, 1917, for about twenty minutes Funchal on the island of Madeira, destroying many houses and killing and wounding many people.
On the same day German destroyers attacked a convoy of merchantmen in the North Sea and sank six of them as well as a British destroyer and four armed trawlers.
Two days later, December 14, 1917, the French cruiser _Château Renault_ was sunk in the Mediterranean by a submarine which itself was destroyed later on.
During the night of December 22-23, 1917, three British destroyers were lost off the Dutch coast with a total loss of lives of 193 officers and men. On December 30, 1917, the British transport _Aragon_ and a British destroyer, coming to her assistance, were torpedoed and sunk. The following day, December 31, 1917, the auxiliary _Osmanieh_ struck a mine and sank. The total loss involved in these three sinkings was 809 lives, of which forty-three were members of the crew and officers, and 766 military officers and soldiers.
During the night of January 12, 1918, two British destroyers ran ashore off the coast of Scotland. All hands were lost. Yarmouth was bombarded on January 14, 1918, for five minutes by German naval forces and four persons were killed and eight injured.