Albert II vs Injong of Goryeo

Upon the death of his father-in-law Sigismund, Albert II inherited the crowns of Bohemia and Hungary. He was crowned King of Hungary in 1438 and King of Bohemia in 1438, though his rule in Bohemia was contested by the Hussites. This expanded Habsburg influence in Central Europe.

Following the death of Sigismund, Albert II was elected King of the Romans, becoming the first Habsburg to hold the title. His election marked the beginning of the Habsburgs' near-continuous hold on the imperial throne until 1806. Albert's reign was brief, lasting only two years.

Albert II led a military campaign against the Ottoman Empire in Serbia, aiming to halt their advance into the Balkans. The campaign was cut short by an outbreak of dysentery in the Christian army. Albert himself fell ill and died on the return journey, leaving his infant son Ladislaus the Posthumous as his heir.

The Buddhist monk Myocheong led a rebellion in Pyongyang, advocating for moving the capital and attacking the Jurchen Jin dynasty. King Injong initially supported the plan but later opposed it, leading to a three-year revolt that was crushed by the general Kim Bu-sik.

General Kim Bu-sik, acting on Injong's orders, besieged and captured Pyongyang, ending the Myocheong rebellion. The victory strengthened the authority of the civil bureaucracy over military and religious factions, but also deepened regional tensions.

Injong oversaw the compilation of a new legal code based on Tang and Song Chinese models. The code standardized administrative procedures and criminal law, but its implementation was uneven due to aristocratic resistance.