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.
North Korea at the 2018 Winter Olympics
The South Korean President, Moon Jae-in, at the start of the Olympics shook hands with Kim Yo-jong. This marked the first time since the Korean War that a member of the ruling Kim dynasty had visited South Korea. In contrast, US Vice President Mike Pence met North Korean defectors in PyeongChang joined by Fred Warmbier, whose son Otto died the year before after being released from North Korean captivity. American officials said that North Korea cancelled a meeting with Pence at the last minute.