On September 15, 1950 U.S. Marines made a surprise amphibious landing at the strategic port of Incheon (formerly romanized as Inchŏn) on the west coast of Korea, about 100 miles south of the 38th parallel and 25 miles from Seoul.

Although many among the U.S. Joint Chiefs of Staff had criticized the landing as too risky, United Nations Supreme Commander Douglas MacArthur insisted on carrying out the bold landing.

After the successful landing, American-led U.N. forces broke North Korean supply lines and pushed inland toward Communist-held Seoul.