Ivan Mazepa defected to this country, only to flee with its defeated ruler to the Ottoman Empire.
One king of this nation faced impending mutiny from military officers in the Anjala Conspiracy. That king of this country increased his power with the Act of Union and Security before his eventual assassination at the Royal Opera House. This country featured political factions called the "Caps" and "Hats" during its so-called Age of Liberty in the eighteenth century. One leader of this nation defeated Augustus the Strong at Kliszow before installing Stanislaw I as ruler of Poland. Ivan Mazepa defected to this country, only to flee with its defeated ruler to the Ottoman Empire. This nation won the battle of Narva before suffering a major loss at Poltava. For 10 points, name this northern European nation, which under Charles XII lost the Great Northern War to Russia.
One king of this nation faced impending mutiny from military officers in the Anjala Conspiracy.
the Kingdom of {Sweden}