Japanese invasion of Korea: Approximately 3,000 Joseon defenders led by general Kwŏn Yul successfully repel more than 30,000 Japanese forces in the Siege of Haengju.

The Imjin War was a series of two Japanese invasions of Korea: an initial invasion in 1592 also individually called the "Imjin War", a brief truce in 1596, and a second invasion in 1597 called the Chŏngyu War. The conflict ended in 1598 with the withdrawal of Japanese forces from the Korean Peninsula after a military stalemate in Korea's southern provinces.

Joseon, officially Great Joseon, was a dynastic kingdom of Korea that existed for 505 years. It was founded by Taejo of Joseon in July 1392 and replaced by the Korean Empire in October 1897. The kingdom was founded after the overthrow of Goryeo in what is today the city of Kaesong. Early on, Korea was retitled and the capital was moved to modern-day Seoul. The kingdom's northernmost borders were expanded to the natural boundaries at the rivers of Amnok and Tuman through the subjugation of the Jurchens.

Kwŏn Yul was a Korean army general and the commander-in-chief of the Joseon period, who successfully led the Korean forces against Japan during the Japanese invasions of Korea. He is best known for the Battle of Haengju where he defeated an attacking force of about 30,000 Japanese with 2,800 troops.

The Battle of Haengju took place on 14 March 1593 during the 1592–1598 Japanese invasion of Korea. The Japanese attack failed to overcome the fortress Haengjusanseong.