[214] Normally a component of the 2d Battalion, Company E had been attached to the 3d Battalion on 1 September when the company took over the Bunker Hill outpost. The relieved Company H was then attached to 2/1, the reserve battalion, from 1–3 September. This Chinese withdrawal was only temporary, for the initial probe proved the forerunner of more serious activity. Again at 0100 on 5 September a heavy deluge of Chinese mortar and artillery began raining on Hill 122. The intense preparation had apparently convinced the Chinese attacking force that they had eliminated resistance at the Marine outpost, for their soldiers walked upright toward Marine positions, without bothering to make any attempts at concealment. After discovering that a stout defense was still being maintained at Bunker, the Chinese again withdrew and reorganized. When they resumed the attack, the Chinese used considerably greater caution. This time, in addition to small arms, automatic weapons fire, and a hail of grenades, their assault was supported by artillery and mortars. The results of this concerted effort were not too rewarding, however. Assaults on the center of Hill 122 were repulsed and attempts to crack the left perimeter of Company E’s defenses were even more speedily beaten back. A number of Chinese attempting to outflank the E/2/1 defenders inadvertently strayed too far to the right of the outpost and found themselves advancing against the MLR south of Hill 122. When JAMESTOWN forces engaged these wanderers by fire, the latter quickly realized their mistake and wheeled left for a hasty retreat. They immediately came under fire of their own troops, some of whom had meanwhile penetrated 60 yards into the extreme right of the Bunker positions. At this point, Captain Moak’s Company E launched a counterattack and restored its positions on the right. This action forced a general withdrawal of the Chinese force, which the Marines estimated at battalion strength. Lieutenant Colonel Sidney J. Altman[215] subsequently advised division headquarters that his men had killed 30 enemy soldiers and estimated that as many as 305 were probably wounded. This high rate of casualties was attributed, in part, to the enemy’s mistaken sense of direction, their direct walking approach which had made them easy standing targets, and to the box-me-in artillery fires supporting the defenders. Marine losses were 12 killed and 40 wounded, caused mostly by Chinese mortars and artillery. [215] On 20 August Lieutenant Colonel Altman became the commander of 3/1 in relief of Lieutenant Colonel Armitage.