Diplomatic relations between South Korea and the United States commenced in 1950, when the United States helped establish the modern state of South Korea, officially the Republic of Korea, and fought on its UN-sponsored side in the Korean War (1950–1953). During the subsequent decades, South Korea experienced tremendous economic, political and military growth.
South Korea has a long military alliance with the United States, aiding the U.S. in every war since the Vietnam War, including the Iraq War. At the 2009 G20 London summit, then-U.S. President Barack Obama called South Korea "one of America's closest allies and greatest friends." In 1987, South Korea was among the first batch of countries to be designated as a major non-NATO ally. In June 2023, South Korean President Yoon Suk Yeol said that he had upgraded the country's alliance with the United States to one that is "nuclear-based" in the face of North Korea's growing military threat.
By 2014 several security factors were shaping the alliance: The challenges posed by North Korea's nuclear and missile program and the potential of weapons proliferation to other states, The impact of peace and reunification developments on the Korean peninsula on the strategic relationship between the United States and China The potential impact of events on the Korean peninsula on Japan and Sino-Japanese rivalry.
South Korea is currently one of the most pro-American countries in the world. According to a 2018 Pew survey, 77% of South Koreans had a favorable view of the United States, while 21% had a negative view. According to a 2018 Gallup poll, 77% of Americans had a favorable view of South Koreans, while 22% had a negative view.
However, signs indicate S.K.-U.S. relations may be simultaneously strengthening, as cultural exchange (see also TALK program), developments in media partnership (See Parasite Oscar win), and a strong trade in goods and services continues. South Korea is also a top destination of U.S. military hardware, with a recent deal in August 2019 for Seahawk helicopters topping 800 million dollars.
Country comparison
Leaders of South Korea and the United States from 1950
Historical background
Following the United States expedition to Korea in 1871, the United States and Joseon established diplomatic relations under the 1882 Treaty of Peace, Amity, Commerce, and Navigation. However, Japan assumed direction over Korean foreign affairs in 1905 and in 1910 began a 35-year period of colonial rule over Korea.
In 1945, at the end of World War II, Japan surrendered to the Allies and the Korean Peninsula was divided at the 38th parallel into two occupation zones, with the United States in the South and the Soviet Union in the North. Initial talks in 1945–6 to achieve a unified, independent Korea were not successful, and in 1948 two separate nations were established: the Republic of Korea (ROK) in the South, and the Democratic People's Republic of Korea (DPRK) in the North. On January 1, 1949, the United States officially recognized the Republic of Korea as the sole legitimate government of Korea and established diplomatic relations on March 25 of that year.
Korean War (6.25 War)
Cross-border skirmishes and raids at the 38th Parallel escalated into open warfare when the North Korean forces invaded South Korea on June 25, 1950. In response, 16 member countries of the United Nations, including the United States, came to the defense of South Korea. It was the first significant armed conflict of the Cold War with extensive deployment of U.S. and other troops.
Origins of the South Korea–United States alliance
Following the end of World War II, the United States established a bilateral alliance with South Korea instead of establishing a multilateral alliance with South Korea and other East Asian countries.
Moreover, the "U.S. alliance with South Korea would consequently have three functions. First, it would serve as part of a network of alliances and military installations designed to ring the Soviet threat in the Pacific. Second, it would deter a second North Korean attack, with U.S. ground troops serving as the "tripwire" guaranteeing U.S. involvement. Third, it would restrain the South from engaging in adventurism."
The United States and South Korea are allies under the 1953 Mutual Defense Treaty. Under the agreement, U.S. military personnel have maintained a continuous presence on the Korean peninsula.