Within ten minutes, Vegas, furthest east of the four OPs in 1/5 territory, became the object of serious enemy attention. Outposts Berlin and East Berlin, meanwhile, still further east in the 3/5 sector proper were also engaged by fire from hostile small arms and mortars from Chinese occupying Hills 15 (Detroit), 13 (Frisco), and 98 to the northeast. As the coordinated fire attack raged throughout the 5th Marines regimental front, preparatory fire and diversionary probes hit the 1st Marines sector. Outposts Hedy, Bunker, Esther, and Dagmar, in the center regimental area, were struck by small arms, mortars, and artillery shells a few minutes before 1900. Platoon and squad strength limited attacks were conducted against Dagmar, Hedy, and Esther, and enemy units were sighted moving in front of the KMC, further west along the MLR. At precisely 1910, a force of 3,500 Chinese from the 358th Regiment, 120th Division, 46th CCF Army began to swarm down from Ungok, Arrowhead, Hill 25A, and Hill 190 and launched a massive assault in regimental strength against the 5th Marines sector. (Map 27.) Elements of six companies from three battalions converged on the area from three directions. Two enemy platoons of the 1st Company, 1st Battalion from Ungok struck Carson while one infantry company each, initially, began a direct assault on Reno and Vegas. Units from the 3d Company, 1st Battalion, from Arrowhead and Hill 29, crossed the Seoul road to hit Reno in a direct frontal assault. Elements of the 7th Company, 3d Battalion moved down from Hill 190, a mile north, to encircle the left flank of Reno and thus strike from the rear of the Marine position. Other Chinese soldiers of the 8th Company, 3d Battalion, supported by the 9th Company, moved some 500 yards south of their ridgeline positions on Hill 25A and 155 immediately north of Vegas to attack the outpost head-on. Another enemy unit, the 2d Company, 1st Battalion, swept south from Hill 57A and made diversionary probes of the two most remote outposts of the entire 1st Marine Division line, Berlin and East Berlin in the 3d Battalion sector. These two smaller positions, each manned by a reinforced squad-size detachment from G/3/5, were to be successful in driving off the enemy’s less determined efforts there with a rain of small arms, mortar, and artillery fires.