Question: Magdalena of Nassau-Dillenburg's brother lead a revolt that set off what war?

Gustav IV Adolf or "Gustav IV Adolph" (1 November 1778 – 7 February 1837) was King of Sweden from 1792 until his abdication in 1809.  He was the son of Gustav III of Sweden and his queen consort Sophia Magdalena, eldest daughter of Frederick V of Denmark and his first wife Louise of Great Britain.  He was the last Swedish ruler of Finland, the occupation of which by Russian Emperor Alexander I in 1808-09 was the immediate cause of his violent downfall.  After an army revolt, the king was seized by officers and forced to relinquish the throne on behalf of his family on March 29, the anniversary of his father's death (due to gunshot wound, in 1792).  The Instrument of Government subsequently written was adopted on June 6, the current National Day of Sweden, and was in effect until replaced in 1974.  The crown (now with strictly limited powers) passed to his childless uncle, Charles XIII, whose want of heirs set into motion an intense quest for a successor who was found the following year in the person of Jean-Baptiste Bernadotte, who assumed the throne in 1818, commencing the present House of Bernadotte. <SEP> Nicholas I (Russian: Николай I Павлович , "Nikolay I Pavlovich" ; 6 July [O.S. 25 June] 1796 – 2 March [O.S. 18 February] 1855 ) was the Emperor of Russia from 1825 until 1855.  He was also the King of Poland and Grand Duke of Finland.  He is best known as a political conservative whose reign was marked by geographical expansion, repression of dissent, economic stagnation, poor administrative policies, a corrupt bureaucracy, and frequent wars that culminated in Russia's defeat in the Crimean War of 1853–56.  His biographer Nicholas V. Riasanovsky says that Nicholas displayed determination, singleness of purpose, and an iron will, along with a powerful sense of duty and a dedication to very hard work.  He saw himself as a soldier—a junior officer totally consumed by spit and polish.  A handsome man, he was highly nervous and aggressive.  Trained as an engineer, he was a stickler for minute detail.  In his public persona, says Riasanovsky, "Nicholas I came to represent autocracy personified: infinitely majestic, determined and powerful, hard as stone, and relentless as fate."  His reign had an ideology called "Official Nationality" that was proclaimed officially in 1833.  It was a reactionary policy based on orthodoxy in religion, autocracy in government, and Russian nationalism.  He was the younger brother of his predecessor, Alexander I.  Nicholas inherited his brother's throne despite the failed Decembrist revolt against him and went on to become the most reactionary of all Russian leaders.  His aggressive foreign policy involved many expensive wars, having a disastrous effect on the empire's finances. <SEP> William I, Prince of Orange (24 April 1533 – 10 July 1584), also widely known as William the Silent or William the Taciturn (translated from Dutch: "Willem de Zwijger" ), or more commonly known as William of Orange (Dutch: "Willem van Oranje" ), was the main leader of the Dutch revolt against the Spanish Habsburgs that set off the Eighty Years' War and resulted in the formal independence of the United Provinces in 1581.  He was born in the House of Nassau as Count of Nassau-Dillenburg.  He became Prince of Orange in 1544 and is thereby the founder of the branch House of Orange-Nassau and the ancestor of the monarchy of the Netherlands. <SEP>  Magdalena was a sister of William the Silent. Magdalena of Nassau-Dillenburg (15 December 1547 at Dillenburg Castle in Dillenburg – 16 May 1633 in Öhringen) was a daughter of William I, Count of Nassau-Dillenburg and his second wife, Juliana of Stolberg.