Tôn on 23 January to occupy as much territory and gain control of as much population as possible, but ARVN counter-operations again prevented any significant successes. The third element of the PAVN 1st Division, the 101D Regiment, apparently remained in its base in the Seven Mountains and contributed only with attacks by fire. The highest level of PAVN activity in MR 3 occurred in Chương Thiện Province. Four PAVN regiments were available to converge on the province capital, Vị Thanh. The PAVN 18B Regiment was to the northwest, the 95A Sapper Regiment was south along with elements of the D2 Regiment and part of the D1 Regiment was in eastern Chương Thiện near the Phong Dinh Province border. The PAVN headquarters for MR 3 was in the center of the province. The number and intensity or attacks increased sharply on 26 January, including a series of mortar and rocket attacks, some with 120mm mortars, southwest of Y Tang. The activity increased again on 27 January and a number of outposts and district towns experienced ground attacks and attacks by fire. Contingents of the D2 Regiment penetrated the district town of Long Mỹ as far as the marketplace before they could be driven out. On the same day Kien Thien received a heavy bombardment followed by a ground attack by elements of the 95A Sapper Regiment, this attack was also repelled. At Kien Hung, through the nights or 27 and 28 January the 18B Regiment conducted attacks by fire. By the morning of 28 January the town was surrounded by PAVN troops, but South Vietnamese forces successfully held. The province capital, Vị Thanh, received sporadic attacks by fire, but casualties and damage were light. Attacks were widespread to the far south, primarily against RF/PF outposts and district towns, but in no case did the situation change markedly from that before the campaign got under way. The activity appeared to crest by midday on 28 January, and a general uneasy quiet followed. During the campaign at least 125 hamlets came under PAVN attack, but no more than 20 were ever being contested at anyone time. No main lines of communication were ever threatened and all major roads and canals remained open to traffic. Assassinations and other terrorism lagged. Nowhere in the Mekong Delta did the PAVN make any significant or lasting gain. In the face of the highly successful Operation Dong Khoi,