With the outbreak of Japanese invasions in 1592, Yujeong joined his teacher Seosan's righteous army of monks.

Some Confucian scholars, as well as farmers, formed over 60 successive righteous armies to fight for Korean freedom.

The first righteous armies emerged during the Khitan invasions of Korea and the Mongol invasions of Korea.

The righteous armies were an irregular military that fought the Japanese army that twice invaded Korea during the Japanese invasions of Korea (1592-1598).

However, this was not the case and righteous armies continued to interrupt the Japanese supply line.

Fuming at the revolt, Jeonng put together a righteous army with seonbis.

"His voice cracking with emotion, the courageous man reported that they were facing a righteous army and lamented the fact that they held different beliefs," the narrator notes.

Local yangbans and commoners joined righteous armies.

Others, perhaps inspired to action by Min's death, joined righteous armies (uibyeong).

"righteous armies").