That night at 0130, trip flares and exploding booby traps were the prelude to the first NKPA probing attacks on the perimeter. The enemy was half an hour late, but otherwise the assault developed pretty much as the CIC team had predicted, even to the identification of elements of the 45th Regiment of the 15th NKPA Division. The assailants showed no disposition to close, and the assault turned into a desultory fire fight. At 0500, with a fog reducing visibility almost to zero, the enemy could be heard but not seen in his assault on the battalion OP. This position was located on the How Company front and manned by wiremen and artillery and mortar FO teams. When their ammunition ran out, these Marines were forced to withdraw; but Captain Thomas E. McCarthy, Second Lieutenants Charles Mattox and Charles R. Stiles with an assortment of H&S Company personnel recaptured the position the moment that the fog lifted. The enemy withdrew into the hills after the Corsairs came on station, and the action ended at 0730 with two wounded Marines representing the casualty list of 3/1 in the engagement.[179] [179] S-3 1stMar tel to G-3 1stMarDiv, 0945 7 Nov 50. 1stMar _SAR_, 10, 3/1 _SAR 7 Oct-25 Nov 50_, 5–6; 2/11 _SAR_, 17; Capt C. R. Stiles ltr to HistBr, G-3, HQMC, 25 Jan 56; Corley Comments. Able Company returned to Wonsan that morning with 619 of the prisoners who had been accumulating at Majon-ni until the stockade was almost overflowing with Korean humanity. Captain Barrow packed the captives into open trucks covered with tarpaulins. This precaution was taken in order not to advertise the nature of the cargo while passing through Ambush Alley, since it might be embarrassing if the guerrillas attempted to liberate prisoners who outnumbered their keepers three to one. Simultaneously with the return of Able Company, Colonel Puller ordered his 2d Battalion (-) to proceed via the Majon-ni road to Munchon-ni. Lieutenant Colonel Sutter’s mission was similar to that of Lieutenant Colonel Ridge at Majon-ni: to block enemy movement along the trails leading north and to screen civilians. The hamlet of Munchon-ni squatted near the top of the highest pass along Ambush Alley. Trucks could be supplied for only one reinforced rifle company--Easy--which departed Wonsan at 0830. Four miles short of the objective, the motorized column entered a horseshoe bend large enough to contain all the vehicles. On the left of the road was a sheer drop, and on the right rose cliffs 200 feet in height. The last truck had just entered the bend when the first was stopped by a landslide roadblock. As the column ground to a halt the enemy opened up with rifles and automatic weapons from well camouflaged positions in the high ground at the far end of the horseshoe.[180]