The Joint Security Area at Panmunjom sits within the Korean Demilitarized Zone, a 250-kilometer-long buffer that has divided the peninsula since 1953. Despite its name, the DMZ is one of the most heavily militarized borders in the world, with minefields, guard posts, and razor wire stretching from coast to coast. The Peace House, a South Korean building just south of the demarcation line, was selected as the summit venue. North Korea accepted it from among several locations proposed by Seoul. The choice carried symbolic weight: the Peace House had been built specifically for inter-Korean dialogue, though it had seen precious little of it. The last inter-Korean summit had taken place eleven years earlier, in 2007, when President Roh Moo-hyun traveled to Pyongyang.

Summits between nations at war are choreographed down to the menu, and every detail carries meaning. The banquet featured a mango mousse dessert labeled 'Dokdo,' the Korean name for a disputed island group that Japan calls Takeshima. The Japanese Foreign Ministry formally protested, calling the dessert 'very unnecessary.' Foreign Minister Taro Kono reiterated Japan's territorial claims. The desserts were served anyway. Kim and Moon cracked them open with small mallets, a gesture meant to symbolize breaking through to a new relationship. The culinary controversy was a reminder that even in a moment of historic reconciliation between the two Koreas, the region's overlapping territorial grievances were never far from the table.

The Panmunjom Declaration, signed by both leaders at the conclusion of the summit, pledged to work toward the denuclearization of the Korean Peninsula, though Kim did not explicitly agree to surrender North Korea's nuclear weapons. The two leaders committed to converting the 1953 armistice into a formal peace treaty, potentially ending the Korean War after sixty-five years. They also agreed to establish new communication channels, reduce military tensions along the border, and arrange for Moon to visit Pyongyang later that year. On May 5, North Korea adjusted its time zone to match the South's, a small but symbolically charged concession. The same day, South Korean authorities stopped North Korean defectors from launching propaganda balloons across the border, a gesture of goodwill toward the North.

Kim and Moon met twice more in 2018, once in a surprise summit on the North Korean side of Panmunjom in May, and again over three days in Pyongyang in September. The May meeting focused largely on Kim's upcoming summit with U.S. President Donald Trump in Singapore. The September summit produced additional agreements on military confidence-building measures. But the broader diplomatic architecture began to crack when the U.S.-North Korea negotiations stalled. The Hanoi summit between Trump and Kim in February 2019 collapsed without an agreement, and inter-Korean relations cooled rapidly afterward. The tree that Kim and Moon planted at Panmunjom still stands, but the peace treaty they promised has not materialized.

The live broadcast of the summit was shown on South Korean and international television but not in North Korea, where policy forbids live coverage of events involving its leader. That asymmetry captured something essential about the moment: the South experienced it as a shared national event, while the North filtered it through state media days later. For a few months in 2018, the Korean Peninsula seemed to be approaching a turning point. Table tennis teams from the two Koreas fielded a joint squad at the World Championships. Loudspeakers blaring propaganda across the DMZ were dismantled. The concrete curb at Panmunjom, over which Kim had stepped so casually, briefly seemed like the kind of boundary that exists only because people agree it does. It turned out to be more durable than that.