Germany joined the U.S.-led United Nations Command (UNC) in South Korea.
Germany became the 18th nation in the group.
UNC helps police the heavily fortified border with North Korea and has committed to defend the South in the event of a war.
Current UNC members, among them Australia, Britain, Turkey and the United States, sent troops or contributed medical support during the 1950-53 Korean War.
Established in 1950, the UNC was mandated to restore peace and enforce the armistice while serving as a channel of communication with North Korea.
It is led by the commander of the U.S. military stationed in South Korea.