The battalion was reactivated 11 September 1950 at Kobe, Japan and assigned to the 1st Marine Division. They deployed in September 1950 to the South Korea and participated in the Inchon-Seoul. Following the recapture of Seoul, the 1st Marine Division was pulled out of northwest Korea and sailed to the east coast where they landed at Wonsan in late October and began to march north towards the Yalu River.