Progress might have been more rapid for all units if adequate transportation had been available for RCT-1 in the Chigyong area. Only by using vehicles of the 11th Marines was it possible to move 1/1 to Chinhung-ni, where it relieved the 3d Battalion of the 5th Marines on 23 November. During the next two days the 2d Battalion and RCT-1 Headquarters relieved 2/5 at Koto-ri. After the return of the vehicles, 3/1 (less Company G, left behind for lack of trucks) was lifted to Hagaru on the 26th to relieve the 2d Battalion, 7th Marines.[361] [361] 1stMar _SAR_, 13, and appendix 6, 4; 1stMar _HD, Nov 50_, 2; 1stMarDiv msg to COs 11th & 1stMars, 1350, 22 Nov 50. All three battalions of RCT-5 were operating east of the Chosin Reservoir by 24 November. Until supply levels were built up at Hagaru, however, General Smith kept a careful check on the advance in this quarter. The farthest penetration took place on the 25th when a platoon-size patrol of 3/5, reinforced by two tanks, drove nearly to the northern end of the Reservoir. Scattered enemy groups were flushed out and an abandoned 75mm gun destroyed after a pursuit resulting in five Chinese killed and one captured. This was one of the few encounters in an area combed by patrols from all three battalions, and no signs of large-scale enemy activity were reported by Lieutenant Colonel Robert D. Taplett, CO of 3/5, after a helicopter reconnaissance.[362] [362] 5thMar _SAR_ 15–18. Smith, _Notes_, 626. Meanwhile RCT-7 began its move to Yudam-ni. This objective had first been mentioned as early as 11 November in X Corps OpnO 6. But until RCT-1 could be brought up to the MSR, the Division Commander limited the advance to the vicinity of Toktong Pass. There an estimated 150 to 200 enemy resisted with machine-gun fire but were scattered with the aid of air strikes and artillery support. On the 23d, in accordance with Division OpnO 23-50, the 1st Battalion led the advance of RCT-7. During the next two days Lieutenant Colonel Davis’s reinforced battalion methodically cleared booby-trapped but undefended road blocks and scattered small groups of enemy along the route. The men of 1/7 belatedly celebrated Thanksgiving on the 24th with a full, hot turkey dinner--their last full meal for 17 days--and seized battered Yudam-ni the next day against negligible resistance.[363] The 3d Battalion, regimental headquarters, and 3/11 (-) followed. [363] 7thMar _SAR_, 19–20; MajGen H. L. Litzenberg Comments, 19 Jul 56; Col R. G. Davis Comments, n. d.