South Korea and the United States will hold their biannual Korea-U.S. Integrated Defense Dialogue (KIDD) in Washington from Tuesday, with senior defence officials from both sides set to discuss a wide range of alliance security issues. Key agenda items include the long-pending transfer of wartime operational control (OPCON) — the authority to command South Korean forces in wartime, which has remained with the U.S.-led Combined Forces Command since 1978 — back to Seoul, with a target of meeting transfer conditions by early 2029. The two sides are also expected to address South Korea's push to gain civilian access control over parts of the Demilitarized Zone (DMZ) on the heavily fortified inter-Korean border, North Korea's nuclear and missile threats, and U.S. calls for Seoul to join a coalition to secure navigation through the Strait of Hormuz.