During the "Seven Years' War", (1756–1763), the Russian Baltic Sea fleet was active on the Pomeranian coast of northern Germany and Prussia, helping the infantry to take Memel in 1757 and Kolberg in 1761. The Oresund was blockaded in order to prevent the British Navy from entering the Baltic sea. During the Russo-Swedish War (1788–1790) the fleet, commanded by Samuel Greig, checked the Swedes at Hogland (1788) and the Viborg (1790). An impetuous Russian attack on the Swedish galley flotilla on 9 July 1790 at the Second Battle of Svensksund resulted in a disaster for the Russian Navy who lost some 9,500 out of 14,000 men and about one third of their flotilla. The Russian defeat in this battle effectively ended the war.