For 10 points, name this northern European kingdom which lost the Great Northern War to Russia.
This kingdom acceded to Dutch demands by signing the Treaty of Elbing after its 1650s siege of Danzig forced Dutch intervention. This kingdom reached its largest territorial extent during its stormaktstiden, or "great power" era. This kingdom occupied Poland during a period called the Deluge. One non-native warrior who defected to this kingdom's side, and then fled to Bendery castle in Moldavia, was Cossack hetman (*) Ivan Mazepa. This kingdom, which secured peace with Denmark in the 1700 Peace of Travendal, had a Napoleonic general installed on its throne to begin the House of Bernadotte. It lost the Battle of Poltava under king Charles XII. For 10 points, name this northern European kingdom which lost the Great Northern War to Russia.
This kingdom acceded to Dutch demands by signing the Treaty of Elbing after its 1650s siege of Danzig forced Dutch intervention.
Sweden [or Konungariket Sverige or Svenska stormaktstiden]