KoreaUS

KoreaUS is a commonly used shorthand for the bilateral relationship between South Korea (the Republic of Korea) and the United States. It covers political alignment, security cooperation, economic ties, and cultural exchange that have developed since the Korean War.

The modern alliance began with the Mutual Defense Treaty of 1953, establishing a long-term security commitment and the presence of U.S. forces on the Korean peninsula. Over the decades, the partnership expanded to include coordinated diplomacy, joint military exercises, and shared strategic interests in regional stability and defense deterrence.

Economically, the two nations are major trading partners and investors. The Korea–United States Free Trade Agreement (KORUS) began to operate fully in 2012 and continues as a central framework for trade, investment, and regulatory cooperation, subject to periodic updates. Cultural and educational exchanges, research collaboration, and people-to-people links further deepen ties.

In global affairs, KoreaUS relations influence regional diplomacy concerning North Korea, China, and multilateral issues. The alliance is dynamic, adapting to changes in leadership, regional security concerns, and global economic conditions, while remaining a cornerstone of bilateral policy.