which had landed at Inchon. After several days of "mopping up" operations, the battalion moved on 4 October to the vicinity of Wijon-ni to prepare for crossing the Imjin River as American and United Nations troops continued to advance northward. They crossed the river on 7 October, and continued across the Yesong River on 12 October. Continuing to advance northward against sporadic resistance the battalion reached Pyongyang on 20 October. From Pyongyang, Company C and other battalion elements made contact with the 187th Regimental Combat Team, which had made an airborne drop in the vicinity of Sunchon. The 1st Cavalry Division and the 70th Tank Battalion continued to advance northward and reached Unsan, some 30 miles north of Pyongyang by 29 October. Chinese Communist Forces intervention On 31 October, Chinese forces counterattacked the American and UN forces in Korea. The 70th was heavily engaged in providing rear guard for the 1st Cavalry Division as they began to withdraw to the south. Fighting by platoon in support of each infantry battalion, units were frequently cut off, isolated and forced to fight through heavy Chinese forces, suffering heavy casualties in the process. Some platoons, especially those supporting the 8th Cavalry Regiment, were effectively annihilated. Initially, the units' priority was to exfiltrate back through the Chinese forces. By 9 November, the 1st Cavalry and the 70th Tank Battalion had reestablished their front line and defended their positions through 17 November. On 18 November, they conducted combat reconnaissance until the 1st Cavalry Division was placed in Army reserve on 21 November, where they remained until 28 November. On 28 November, the division was committed to the Eighth Army's right flank to prevent encirclement by the Chinese. From these positions along a line from Kunu-ri through Sunchon, the 1st Cavalry Division covered the withdrawal of the western sector of the Eighth Army. The division conducted an orderly withdrawal to near Uijongbu, just north of Seoul, by 12 December 1950. A new defensive line was established here and the 1st Cavalry Division, with its 70th Heavy Tank Battalion attachment, maintained these positions through the end of the year. In early January 1951, the 70th Tank Battalion began preparations to move out of the line, and on 7 January 1951 moved into assembly areas in the vicinity of Singidong. Over the next two weeks the battalion conducted maintenance and repairs on vehicles and integrated and trained new