By the time the Eighth Army Ranger Company completed training on 1 October, UN forces had broken out of the Pusan Perimeter following an amphibious landing at Inchon. The company was subsequently committed to the offensive from Pusan Perimeter. On 8 October it was redesignated the 8213th Army Unit signifying its activation as a unit, and on 14 October Puckett took an advance force to join the US 25th Infantry Division at Taejon, as part of the US IX Corps. The Rangers' first assignment was to probe north to Poun with the division's reconnaissance elements in search of pockets of guerrillas which had been isolated during the UN breakout from Pusan. The platoons moved to two villages near Poun and began a northward sweep with the 25th Infantry Division. The troops then rapidly moved to Kaesong where they eliminated the last North Korean resistance south of the 38th Parallel. In these missions, the Eighth Army Ranger Company saw frequent combat with small groups of North Korean troops. During this time they also scrounged supplies from local units, including commandeering a jeep, and taking rice and other rations from the countryside.