information:classification
Leadership of Kim Jong Un

On 17 December 2011, Kim Jong Il died from a heart attack. His youngest son Kim Jong Un was announced as his successor. In the face of international condemnation, North Korea continued to develop its nuclear arsenal, possibly including a hydrogen bomb and a missile capable of reaching the United States.

Throughout 2017, following Donald Trump 's ascension to the US presidency, tensions between the United States and North Korea increased, and there was heightened rhetoric between the two, with Trump threatening "fire and fury" if North Korea ever attacked U.S. territory amid North Korean threats to test missiles that would land near Guam. The tensions substantially decreased in 2018, and a détente developed. A series of summits took place between Kim Jong Un of North Korea, President Moon Jae-in of South Korea, and President Trump.

On 10 January 2021, Kim Jong Un was formally elected as the General Secretary in 8th Congress of the Workers' Party of Korea, a title previously held by Kim Jong Il. On 24 March 2022, North Korea conducted a successful ICBM test launch for the first time since the 2017 crisis. In September 2022, North Korea passed a law that declared itself a nuclear state.

On December 30, 2023, North Korean leader Kim Jong-un provocatively declared South Korea a "colonial vassal state", marking a significant departure from the longstanding position of mutual claims over the entire Korean Peninsula by both North and South Korea. This statement was followed by a call on January 15, 2024, for a constitutional amendment to redefine the boundary with South Korea as the 'Southern National Borderline,' further intensifying the rhetoric against South Korea. Kim Jong-un also stated that in the event of a war, North Korea would seek to annex the entirety of South Korea.