North Korea
Japan tried to suppress Korean traditions and culture and ran the economy primarily for its own benefit. Korean resistance groups known as Dongnipgun (Liberation Army) operated along the Sino-Korean border, fighting guerrilla warfare against Japanese forces. Some of them took part in allied action in China and parts of South East Asia. One of the guerrilla leaders was the communist Kim Il-sung, who later became the first leader of North Korea.
National Liberation Day of Korea
After the Korean Peninsula was liberated by the Allies in 1945, independent Korean governments were created three years later, on August 15, 1948, when the pro-U.S. Syngman Rhee was elected first President of South Korea and pro-Soviet Kim Il-sung was made first Leader of North Korea. "Gwangbokjeol" was officially designated a public holiday on October 1, 1949 in South Korea and is known as "Chogukhaebangŭi nal" (; literally "Liberation of Fatherland Day") in North Korea.