The following is the June 25, 2024, Congressional Research Service In Focus report, South Korea: Background and U.S. Relations.
From the report
Overview
South Korea (officially the Republic of Korea, or ROK) is one of the United States’ most important strategic and economic partners in Asia. The U.S.-ROK Mutual Defense Treaty, signed in 1953 at the end of the Korean War, commits the United States to help South Korea defend itself, particularly from North Korea (officially the Democratic People’s...
https://news.usni.org/2024/06/28/report-to-congress-on-u-s-south-korea-relations