Orkney from mainland Scotland sought refuge on Orkney and were helped on to safety in Sweden. In 1745, the Jacobite lairds on the islands ensured that Orkney remained pro-Jacobite in outlook, and was a safe place to land supplies from Spain to aid their cause. Orkney was the last place in the British Isles that held out for the Jacobites and was not retaken by the British Government until 24 May 1746, over a month after the defeat of the main Jacobite army at Culloden. Orkney was the site of a Royal Navy base at Scapa Flow, which played a major
Baltic Sea British and French fleet attacked the Russian fortresses in the Baltic. They bombarded Sveaborg, which guards Helsinki; and Kronstadt, which guards Saint Petersburg; and they destroyed Bomarsund in the Åland Islands. After the unification of Germany in 1871, the whole southern coast became German. World War I was partly fought in the Baltic Sea. After 1920 Poland was connected to the Baltic Sea by the Polish Corridor and enlarged the port of Gdynia in rivalry with the port of the Free City of Danzig. During World War II, Germany reclaimed all of the southern and much of the eastern shore