On 7 March 1809, lieutenant-colonel Georg Adlersparre, commander of a part of the so-called western army stationed in Värmland, triggered the Coup of 1809 by raising the flag of rebellion in Karlstad and starting to march upon Stockholm. To prevent the King from joining loyal troops in Scania, on 13 March 1809 seven of the conspirators led by Carl Johan Adlercreutz broke into the royal apartments in the palace, seized the king, and imprisoned him and his family in Gripsholm castle; the king's uncle, Duke Charles (Karl), was thereupon persuaded to accept the leadership of a provisional government, which was proclaimed the same day; and a diet, hastily summoned, solemnly approved of the revolution.