South of the Inchon-Seoul Highway, the 1st Marines attacked from the O-3 Line at 1600. Sutter’s 2d Battalion drove forward on the right of the MSR and passed below Kansong-ni without incident. Continuing a thousand yards farther, Company D scaled the rugged slopes of Hill 186, cleared the summit, and dug in. Fox Company climbed the same high ground shortly afterwards and went into position on the left of Dog and overlooking the highway. Thus 2/1’s front for the night was across the road and slightly to the rear of the high ground positions occupied by Company D of 2/5. Easy Company returned from its independent mission on the right flank and set up a reserve position in the vicinity of Kansong-ni, just rearward of Sutter’s CP at the base of Hill 186.[202] [202] 1st MarDiv _SAR_, Annex Peter Peter; Sutter-Codispoti interv, 25 Jan 55; 2/1 _SAR_, 4; and Carter ltr, 19 Apr 55. The enemy attitude in the 2d Battalion’s zone gradually had developed from occasional sniping early in the day to a pattern of definite light resistance as the Marines surged over Hill 186. Though most of the North Koreans fled after firing a few rounds, their token efforts cost the battalion four killed and 10 wounded. These figures are noteworthy in view of the fact that total losses for the whole Division on D-plus 1 were four KIA and 21 WIA.[203] [203] _Ibid._ Sutter’s troops exacted a comparatively stiff price from the Reds in return, for it was estimated that 120 of the enemy were killed or wounded. Moreover, the Marines captured more than 30 prisoners, 70 rifles, 10 machine guns, and an ordnance dump loaded with small-arms ammunition.[204] [204] 2/1 _SAR_, 4; and Carter ltr, 19 Apr 55. Elsewhere on the 1st Marines front there was considerably more hiking than combat. The 3d Battalion completed its sweep of the Munhang Peninsula about 1600 and assembled at the southern tip of the O-3 Line to await relief by the Reconnaissance Company.[205] In the course of rounding up NKPA prisoners and abandoned weapons, 3/1 had encountered a group of Korean villagers, headed by their schoolmaster, who called themselves the Young People’s Anti-Communist Resistance League. They had armed themselves with Russian rifles and light machine guns left behind by enemy troops fleeing inland.[206] [205] 3/1 _SAR_, 6; Ridge ltr, 12 May 55; Simmons ltr 15 Apr 55. [206] _Ibid._; Maj G. C. Westover ltr to authors, 1 Apr 55; and Capt J. R. Fisher ltr to authors, 18 Apr 55.