US Defense Secretary Pete Hegseth visited the Demilitarized Zone along the border with North Korea as part of a trip to South Korea on Monday, South Korea's defense ministry said.
His visit to the heavily fortified DMZ came ahead of talks expected to involve Washington's goal of reshaping the role of US troops in Korea.
Hegseth landed in the border area in a US army helicopter and met South Korean Defense Minister Ahn Gyu-back, according to video footage released by the South Korean defense ministry.
"I believe it has symbolic and declarative significance itself, demonstrating the strength of the South Korea-US alliance and the combined defense posture," Ahn said of Hegseth's visit to the DMZ.
The defense chiefs are scheduled to hold the annual Security Consultative Meeting on Tuesday, the highest-level forum at which the two countries chart the course of their military alliance and South Korea's defense against nuclear-armed North Korea.
Ahn and Hegseth would discuss combined defense readiness against North Korea and cooperation on regional security and cyber and missile defense, the South's Defense Ministry said.
The two are expected to discuss plans to respond to the "changing security environment and threats" by developing the alliance between the two countries, it said.
Washington is considering making the role of the 28,500 US troops in South Korea more flexible, with an eye on maintaining the balance of power in Asia amid concerns about Chinese activities in the South China Sea and around Taiwan.
US officials have signaled a plan to make US forces more flexible to potentially operate outside the Korean peninsula in response to a broader range of threats, such as defending Taiwan and checking China's growing military reach.
South Korea has resisted the idea of shifting the role of US troops, but has worked to grow its defense capabilities in the past 20 years, with the goal of being able to take on a wartime command of the combined US-South Korean forces. South Korea has 450,000 troops.
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Hegseth visited the Panmunjom truce village on the Demilitarized Zone border with North Korea, accompanied by South Korea's Ahn, according to the South Korean defense ministry.
On Monday, the top military officials of the two countries held their annual meeting on strategic and operational directions for the combined forces and shared the view that the regional security environment was "complex and unstable."
The two chairmen of the Joint Chiefs of Staff pledged cooperation with other allies and partners to maintain the security of the Indo-Pacific and deter potential threats, South Korea's Defense Ministry said in a statement.
Nuclear-armed North Korea has ignored overtures from Trump and South Korean President Lee Jae Myung for dialogue and has dramatically advanced its missile and conventional military capabilities.
