Initiating the infantry action in May was the 1st KMC Regiment, holding the division left flank, with its 2d and 1st Battalions on line. At dusk on 3 May a platoon-size raiding party, under Second Lieutenant Kim Young Ha, left an outpost forward of the 1st Battalion line on a prisoner-taking mission and headed for the objective, Hill 34, adjacent to the rail line to Kaesong and about a half-mile west of the Sachon River. When the platoon was within approximately 1,000 yards of its goal, a support squad was detached near a trail and stream juncture to ambush any enemy attempting to attack the raiders from the rear.[123] The remainder of the platoon, two assault squads, then continued towards the objective, moving cautiously and halting for an hour because of the bright moonlight. [123] This support squad itself was later ambushed. The heavy casualties it received prevented its further participation in the raid. KMC Regt UnitRpt 53, dtd 4 May 52. After midnight the moon disappeared behind the clouds, and the Koreans again emerged. They advanced towards a village immediately south of the objective. After searching a few houses and not finding any enemy, the KMCs started on the last leg to Hill 34. As soon as the objective came into view the raiders deployed for the assault. At 0410 the two squads of Korean Marines charged the knoll, immediately drawing heavy Chinese small arms fire. When the raiders continued their assault, the enemy retreated to his trenchworks and bunkers where he continued to fire on the KMCs. Since it now appeared to the patrol leader that the probability of taking a prisoner was unlikely, he prepared to return to friendly lines. He first arranged for artillery to cover the withdrawal of the patrol, and then broke off the 18-minute fire fight, taking his only casualty, a wounded rifleman, with him. The KMCs counted 12 enemy dead. No prisoners were taken. In the preliminary action, the support squad had also suffered three killed and seven wounded.