On 17 August 1950, after the outbreak of the Korean War, the 7th Marines was reactivated as part of the 1st Marine Division. On 21 September 1950 the regiment landed at Inchon and took part in the recapture of Seoul. On 7 October 1950, after 22 days of fighting, 7th Marines, situated north of the Han River was relieved by units of the US &amp; ROK Armies and retired to a staging area near Incheon.