[17] At the Winter Olympics, North and South Korea marched together in the opening ceremony and fielded a united women's ice hockey team.

[23] On 1 April, South Korean K-pop stars performed a concert in Pyongyang titled "Spring is Coming", which was attended by Kim Jong Un and his wife.

[25] The K-pop stars were part of a 160-member South Korean art troupe which performed in North Korea in early April 2018.

[29] Kim and Moon signed the Panmunjom Declaration pledging to work towards a final peace to the Korean conflict within a year and the complete denuclearization of Korea.

[citation needed] In May, South Korea began removing propaganda loudspeakers from the border area in line with the Panmunjom Declaration.

[36] They also agreed to reopen a jointly operated liaison office in Kaesong that the South had shut down in February 2016 after a North Korean nuclear test.

[36] The second meeting, involving the Red Cross and military, was held on June 22 at North Korea's Mount Kumgang resort, where it was agreed that family reunions would resume.

[37] Donald Trump met with Kim Jong Un on June 12, 2018, in Singapore, in the first summit meeting between the leaders of the United States and North Korea.

They signed a joint statement, agreeing to security guarantees for North Korea, new peaceful relations, reaffirmation of the denuclearization of the Korean Peninsula, recovery of soldiers' remains, and follow-up negotiations between high-level officials.

Immediately following the summit, Trump announced that the US would discontinue "provocative" joint military exercises with South Korea, and he wishes to bring the U.S. forces back home at some point, but he said that was not part of the Singapore agreement.

However, the North Korean state media criticized the meeting soon after, saying the U.S. had shown a "gangster-like attitude" and calling the demands of the Trump administration "deeply regrettable".

[47] According to Vox, Trump had made a spoken agreement with North Korea to sign a declaration ending the Korean War, both at a White House meeting on June 1, and during the Singapore Summit.

However, National Security Adviser John Bolton and Defense Secretary Jim Mattis both opposed signing the declaration before denuclearization.

[53] On July 24, North Korea began to dismantle a rocket launch site at Tonchang, an action which Kim had pledged to Trump.

[62] On 17 July 2018, South and North Korea fully restored their military communication line on the western part of the peninsula.

[67] U.S. General Vincent Brooks responded, "I have some concerns about what that means militarily for the ability to defend along the Military Demarcation Line".

[68] On 13 August, the South Korean Blue House announced that Moon would attend the third inter-Korean summit with Kim in Pyongyang in September.

[69] On September 5, during the meeting with South Korean special envoy Chung Eun-yong about the upcoming summit, Kim declared that he wanted to accomplish the denuclearization of Korea before the US leader Donald Trump completes his first term (January 2021).

[75] Donald Trump met with Kim Jong Un on February 27, 2019, in Hanoi, Vietnam, in the second summit meeting between the leaders of the United States and North Korea.

On February 28, 2019, the White House announced that the summit was cut short and that no agreement was reached, with Trump later elaborating that it was because North Korea wanted an end to all sanctions.

[82] On June 22, 2019, an undated photo was also released by the North Korean government of Kim Jong Un reading a letter from Trump.

[87] After meeting at the border, Trump, Kim and Moon Jae-in entered the Inter-Korean House of Freedom for approximately one hour.

[88][89] A result of the brief meeting was that both U.S. and North Korea agreed to set up teams to resume denuclearization talks, which had previously stalled at the Hanoi Summit earlier in the year.

[92][93] On 16 August 2019, North Korea's ruling party made a statement criticizing the South for participating in the drills and for buying US military hardware, calling it a "grave provocation".

[95][96] Pro-North Korean newspaper Chosun Sinbo welcomed Bolton's resignation, stating that he was to blame for breaking off the February summit in Hanoi.

[102] On December 7, 2019, a spokesman for North Korea's Defense Academy announced that an important test had been conducted at the Sohae Satellite Launching Station, but no details were forthcoming.

[103][104] In December 2019, US Ambassador to the United Nations Kelly Craft said during a meeting of the UN Security Council that was called at her request that the US was prepared to take "simultaneous steps" with North Korea to achieve peace.

[105][106] In May 2020, saying he intended to employ "new policies", Kim met with the Central Military Commission of the Workers' Party and discussed boosting North Korea's nuclear deterrent.

He indicated that subsequent to the meeting with Trump, the North's efforts had focused instead on amassing a more "reliable force to cope with the long-term military threats from the U.S.".

[111] In November, the South Korean defense ministry reaffirmed its commitment to the peace process in an ASEAN security meeting.