EN
The purpose of this study is introducing the role and importance of the United States in ensuring the safety of South Korea. The USA, in act of signing the ROK-U.S. Mutual Defense Treaty with the Republic of Korea in October, 1953, has committed to safeguard the national security of South Korea, and, in particular, to provide protection against external aggression, mainly from North Korea. The strengthening of the guarantees is assisted by the American military presence in the territory of the Republic of Korea, and as well holding of joint military exercises by the U.S. and Korean Armies several times a year. The attention is also drawn to the currently U.S.-South Korean military alliance that has been evolving for years, and seeks to adapt it to the challenges and problems of the modern world, such as common missions in Iraq or Afghanistan.