Foreign Relations of South Korea - United States

United States

Main article: South Korea – United States relations

The United States engaged in the decolonization of Korea (mainly in the South, with the Soviet Union engaged in North Korea) from Japan after World War II. After three years of military administration by the United States, the South Korean government was established. Upon the onset of the Korean War, U.S. forces were sent to defend South Korea against invasion by North Korea and later China. Following the Armistice, South Korea and the U.S. agreed to a "Mutual Defense Treaty", under which an attack on either party in the Pacific area would summon a response from both.

In 1967, South Korea obliged the mutual defense treaty, by sending a large combat troop contingent to support the United States in the Vietnam War. The U.S. Eighth Army, Seventh Air Force, and U.S. Naval Forces Korea are stationed in South Korea. The two nations have strong economic, diplomatic, and military ties, although they have at times disagreed with regard to policies towards North Korea, and with regard to some of South Korea's industrial activities that involve usage of rocket or nuclear technology. There had also been strong anti-American sentiment during certain periods, which has largely moderated in the modern day.

Since the late 1980s, the country has instead sought to establish an American partnership, which has made the Seoul–Washington relationship subject to severe strains. Trade had become a serious source of friction between the two countries. In 1989, the United States was South Korea's largest and most important trading partner and South Korea was the seventh-largest market for United States goods and the second largest market for its agricultural products.

From Roh Tae-woo's administration to Roh Moo Hyun's administration, South Korea sought to establish an American partnership, which has made the Seoul–Washington relationship subject to some strains. In 2007, a free trade agreement known as the Republic of Korea-United States Free Trade Agreement (KORUS FTA) was reportedly signed between South Korea and the United States, but its formal implementation has been repeatedly delayed, pending further approval by the legislative bodies of the two countries.

The relations between the United States and South Korea have greatly strengthened under the Lee Myung-bak administration. At the 2009 G-20 London summit, U.S. President Barack Obama called South Korea "one of America's closest allies and greatest friends."

However, Anti-American sentiment in Korea is growing more intensification. The United States' alleged role in the May 1980 Gwangju uprising was the single most pressing South Korean political issue of the 1980s. Even after a decade, Gwangju citizens and other Koreans still blamed the United States for its perceived involvement in the bloody uprising. In 2008, the protests against U.S. beef has been a center of a major discussion in this year.