HMS Majestic was a Majestic-class pre-dreadnought battleship of the Royal Navy. Commissioned in 1895, she was the largest pre-dreadnought launched at the time. She served with the Channel Fleet until 1904, following which she was assigned to the Atlantic Fleet. In 1907, she was part of the Home Fleet, firstly assigned to the Nore Division and then with the Devonport Division. From 1912, she was part of the 7th Battle Squadron.
HMS Lance was a Laforey-class destroyer of the Royal Navy. Launched a few months before the outbreak of the First World War and attached to the Harwich Force, Lance took part in several engagements during the war, including the sinking of the Königin Luise and the Battle off Texel. She was responsible for firing the first British shot of the war.
HMS Laforey was the lead ship of her class of destroyer built for the Royal Navy. Launched a year before the First World War began, she was attached to the Dover Patrol. Laforey saw action in several engagements with German torpedo boats, including the Battle off Noordhinder Bank and the action of 17 March 1917. Laforey was sunk in 1917 by a British mine after escorting several freighters to France. She was named for Francis Laforey, captain of HMS Spartiate at the Battle of Trafalgar in 1805.
SMS Prinz Adalbert was an armored cruiser built in the early 1900s for the Imperial German Navy. She was named after Prince Adalbert of Prussia, former Commander-in-Chief of the Prussian Navy, and was the lead ship of her class.
HMS Faulknor was a British destroyer of the First World War. She was purchased by the Royal Navy whilst still under construction in Britain for the Chilean Navy who had ordered her in 1912 as part of the Almirante Lynch class. She was renamed after the Faulknor family of British nineteenth century naval officers.
HMS Brilliant was an Apollo-class cruiser of the British Royal Navy which served from 1893 to 1918 in various colonial posts and off the British Isles as a hastily converted minelayer during the First World War.
The Active-class cruisers were a trio of scout cruisers built for the Royal Navy shortly before the First World War. They were initially assigned to the First Fleet and became destroyer flotilla leaders in 1914. Amphion and Fearless and their flotillas were assigned to the Harwich Force when the war began in August 1914. They went out on a patrol on the first day of the war and Amphion and her destroyers encountered and sank a German minelayer. On the voyage home, the cruiser struck a mine laid by the German ship and sank. She was the first ship of the Royal Navy to be sunk in the war.
HMS G4 was a British G-class submarine built for the Royal Navy during World War I.
HMS Snowdrop was an Azalea-class sloop of the Royal Navy. She served during the First World War. Snowdrop survived the war and was sold for scrap in 1923.
HMS Pasley was an Admiralty M-class destroyer built on the Tyne by Swan Hunter & Wigham Richardson for the Royal Navy and launched on 15 April 1916. She saw service during the First World War.
HMS Porpoise was an Acasta-class destroyer of the Royal Navy, which was built by Thornycroft between 1912 and 1914. Porpoise served through the First World War, taking part at the Battle of Jutland in 1916, where she was damaged. In 1920, she was sold to the Brazilian Navy serving under the name Alexandrino de Alencar and was renamed Maranhão in 1927. Maranhão remained in service when Brazil entered the Second World War, being used for patrol and convoy duties. She was disposed of in 1945.
HMS Beagle was one of sixteen destroyers ordered under the 1908–09 Naval Estimates from John Brown & Company of Clydebank. Named for the English hunting dog, she was the sixth ship to carry this name since it was introduced for a Cruizer Class fir-built, brig-sloop on 8 August 1804 and sold on 21 July 1814. The destroyers of the 1908–09 program would be the last coal-fired destroyers of the Royal Navy. She and her sisters served in the First Destroyer Flotilla then were moved en masse to the Third Destroyer Flotilla and before the start of the Great War to the Fifth Destroyer Flotilla. With the advent of the convoy system they were moved to the Second Destroyer Flotilla. With the Armistice she was laid up then scrapped in 1921.
SMS V25 was a V25-class torpedo boat of the Imperial German Navy that served during the First World War. The ship was built by AG Vulcan at Stettin in Prussia, and was completed in June 1914. The ship was sunk by a British mine on 13 February 1915.
SMS V186 was a S-138-class large torpedo boat of the Imperial German Navy. She was built by the AG Vulcan shipyard at Stettin between 1910 and 1911 and launched on 8 February 1911.
SMS V188 was a S-138-class large torpedo boat of the Imperial German Navy. It was built by the AG Vulcan shipyard at Stettin between 1910 and 1911 and launched on 8 February 1911.
SMS S32 was a V25-class large torpedo boat of the Imperial German Navy that served during the First World War. She was built by the Schichau-Werke shipyard in Elbing, East Prussia, being launched on 28 February 1914 and was completed in September that year.
HMS Gentian was an Arabis-class sloop that was sent to assist the Baltic States and their fight for independence. While clearing mines on 15 or 16 July 1919, according to different sources, Gentian and the sloop HMS Myrtle both hit mines and sank with the loss of nine sailors.
HMS Zinnia was an Azalea-class minesweeping sloop of the Royal Navy, built in 1915 at the Swan Hunter & Wigham Richardson yard, at Wallsend in the United Kingdom.It was sold to Belgium on 19 April 1920 to join their new Corps of Destroyers and Sailors.
HMS Mounsey was a Yarrow M-class destroyer of the British Royal Navy. Built by the Scottish shipbuilder Yarrow in 1914–1915, Mounsey served in the Grand Fleet during the First World War, and took part in the Battle of Jutland. The following year she saw combat against German submarines, and in 1918 she helped rescue crew and passengers aboard the damaged troopship Otranto. She was sold for scrap in 1921.
The Hvalen incident was a short and small-scale confrontation between the navies of Sweden and Germany as a consequence of the First World War.
Sweden 
