For 10 points, name this war that made Russia a major power after it defeated Charles XII's Sweden.
During this war, the fortress of Tonning was besieged twice, with the first siege being lifted by the Peace of Travendal. The leader of the losing side in this war was killed at the Siege of Fredriksten, and the victor attempted to invade the Ottoman Empire in the Pruth River Campaign. The Treaty of Altranstadt forced this war's participant Augustus the Strong to cede his claim to the Polish throne. This war ended with one side gaining Estonia and East Ingria in the Treaty of Nystad, and Ivan Mazeppa deserted during a significant victory for Russia at Poltava during this war. For 10 points, name this war that made Russia a major power after it defeated Charles XII's Sweden.
During this war, the fortress of Tonning was besieged twice, with the first siege being lifted by the Peace of Travendal.
Great Northern War