Alexander Jagiellon vs King Chungjeong of Goryeo

Alexander Jagiellon, as Grand Duke of Lithuania, fought a war against Ivan III of Muscovy. The conflict ended with the Truce of 1503, which ceded significant Lithuanian territories to Muscovy, including Chernigov and Starodub.

Alexander Jagiellon signed the Union of Mielnik, which attempted to create a closer union between Poland and Lithuania. The agreement was never fully implemented but represented an early effort to formalize the relationship between the two states.

Alexander Jagiellon was crowned King of Poland following the death of his brother John I Albert. His reign was marked by conflict with the Polish nobility, who sought to limit royal power through the Mielnik Privileges.

Alexander Jagiellon was forced to grant the Mielnik Privileges, which gave the Polish Senate significant control over royal decisions. This weakened the monarchy and strengthened the nobility's political influence.

King Chungjeong became king at age 10 after the death of King Chungmok. Like his predecessor, he was a minor and real power was held by Yuan officials and Goryeo aristocrats, continuing the pattern of weak, puppet rulers.

King Chungjeong was deposed by the Yuan court after a brief reign, due to political intrigues in the Yuan capital. He was exiled to China, and his uncle King Gongmin was installed as king, marking the end of the line of Yuan-dominated puppet rulers.