During the Great Northern War, the Baltic Fleet assisted in taking Viborg, Tallinn, (Estonia), Riga, (Latvia), the West Estonian archipelago (Moonsund archipelago), Helsinki, (Finland), and Turku. The first claimed victories of the new Imperial Russian Navy were the Gangut (Swedish: Hangöudd) in 1714 and, arguably, the Grengam (Swedish: Ledsund) in 1720. From 1715, the English Royal Navy intervened in the Baltic Sea on behalf of the German principality of Hanover, (dynastic home of the current British monarchy) and more or less in a tacit alliance with Russia. During the concluding stages of the war, the Russian fleet would land troops along the Swedish coast to devastate coastal settlements. However, after the death of King Charles XII, the Royal Navy would rather protect Swedish interests after a rapprochement between the Kingdom of Sweden and King George I. A Russian attempt to reach the Swedish capital of Stockholm was checked at the Battle of Stäket in 1719. The losses suffered by the Russian Navy at the Grengam in 1720, as well as the arrival of a Royal Navy squadron under Admiral John Norris, also prevented further operations of any greater scale before the war ended in 1721.