led to Demining activities within the JSA, de-arming of personnel, and sealing off of Guard Posts. On 6 November 2018, UNC conducted a third round of negotiations with the South Korean military and North Korean People's Army on "Rules of Interaction" which would underwrite a Joint Security Area where both sides of the Military Demarcation Line—the de facto border—would be open to personnel. For undisclosed reasons, the North Korean side refused to meet to finalize these rules and the next step for realizing a demilitarized Joint Security Area. See also United Nations Memorial Cemetery in Busan, where 2,300 casualties from various nations are buried Notes References Further reading Grey, Jeffrey. The Commonwealth Armies and the Korean War: An Alliance Study. Manchester University Press, 1990. History of Korea Korean War United Nations operations in Asia United Nations contingents in Korea United Nations Security Council subsidiary organs Multinational units and formations Non-combat military operations involving India United States and the United Nations