Philip I of Castile vs Yeonsangun of Joseon

Philip I of Castile married Joanna of Castile, the daughter of Ferdinand II of Aragon and Isabella I of Castile. This marriage was part of a double alliance between Spain and the Habsburgs, strengthening ties between the two dynasties and eventually bringing the Spanish throne to the Habsburg family.

Upon the death of Isabella I of Castile, Philip I and Joanna became the nominal rulers of Castile. However, Ferdinand II of Aragon disputed their claim, leading to a power struggle. Philip traveled to Castile to assert his authority, but his reign was brief.

Philip I of Castile and Ferdinand II of Aragon signed the Treaty of Villaf

Philip I of Castile died suddenly at the age of 28 in Burgos, possibly from typhoid fever or poisoning. His death left Joanna as the sole ruler of Castile, but her mental instability led to her confinement and the eventual assumption of power by her father Ferdinand II.

Yeonsangun ordered the execution of several Sarim scholars who criticized his rule and his mother's status. This purge marked the beginning of his tyrannical reign and intensified factional conflict.

Yeonsangun launched a second, more brutal purge, executing hundreds of officials and scholars. He targeted those involved in his mother's death and any perceived opposition, creating a climate of terror.

Yeonsangun abolished the Office of Censorship (Saganwon) and the Office of the Inspector General (Saheonbu), removing checks on royal power. This allowed him to rule without restraint.

Yeonsangun was overthrown in a coup led by court officials and military commanders. He was deposed and exiled to Ganghwa Island, ending his tyrannical reign. His half-brother Jungjong was installed as king.