Korea was annexed into the Empire of Japan, marking the start of Japanese rule.
Japanese rule in Korea ended following Japan's surrender in World War II.
The southern zone became the Republic of Korea in August after failed reunification negotiations.
A North Korean invasion triggered the Korean War, a major proxy conflict in the Cold War.
The Korean War ended with an armistice, leaving the Korean conflict ongoing and millions dead.
This movement ended authoritarian rule and established the Sixth Republic of South Korea.