During the day, elements of the N.K. 1st Division forced the 8th Cavalry I&R Platoon and a detachment of South Korean police from the Walled City of Ka-san on the crest of Hill 902, four miles east of Tabu-dong. On 3 September, therefore, Eighth Army lost to the enemy both Tabu-dong and Hill 902, locally called Ka-san, the dominant mountain-top ten miles north of Taegu. [22-52]
The North Koreans now concentrated artillery north of Hill 902 and, although its fire was light and sporadic, it did cause minor damage in the 99th Field Artillery positions. This sudden surge of the enemy southward toward Taegu caused concern in Eighth Army headquarters. The Army ordered a ROK battalion from the Taegu Replacement Training Center to a position in the rear of the 8th Cavalry, and the 1st Cavalry Division organized Task Force Allen, to be commanded by Assistant Division Commander Brig. Gen. Frank A. Allen, Jr. This task force comprised two provisional battalions formed of division headquarters and technical service troops, the division band, the replacement company, and other miscellaneous troops. It was to be used in combat should the North Koreans break through to the edge of the city. [22-53]
Eighth Army countered the North Korean advance down the Tabu-dong road by ordering the 1st Cavalry Division to recapture and defend Hill 902. This hill, ten miles north of Taegu, gave observation all the way south through Eighth Army positions into the city, and, in enemy hands, could be used for general intelligence purposes and to direct artillery and mortar fire. Hill 902 was too far distant from the Tabu-dong road to dominate it; otherwise it would have controlled this main communication route. The shortage of North Korean artillery and mortar ammunition nullified in large part the advantages the peak held as an observation point.
Actually, there was no walled city on the crest of Ka-san. Ka-san, or Hill 902, the 3,000-foot-high mountain which differs from most high peaks in this part of Korea in having an oval-shaped semi-level area on its summit. This oval is a part of a mile-long ridge-like crest, varying from 200 to 800 yards in width, which slopes down from the peak at 902 meters to approximately 755 meters at its southeastern end. On all sides of this ridge crest the mountain slopes drop precipitously. In bygone ages Koreans had built a thirty-foot-high stone wall around the crest and had converted the summit into a fortress. One man who fought in the shadow of the wall commented later, "It looked to me like they built that wall just to keep the land from sliding down." Most of the summit in 1950 was covered with a dense growth of scrub brush and small pine trees. There were a few small terraced fields. Koreans knew Ka-san as the Sacred Mountain. Near the northern end of the crest still stood the Buddhist Poguk Temple.