3 August 1944, the regiment less 2nd battalion, moved by motor to vicinity of Pontorson. At 1500, 3rd Battalion followed by 1st Battalion moved to assembly areas east of Dol de Bretogne at 996029 and 005034 respectively. The 2nd Battalion arrived from Comprond at 1930 and occupied assembly area at 020035. Instructions were received at about 1830 to occupy a line north of Dol de Bretogne from Mont Dol to the coast preparatory to an advance on St. Malo at 0830, 5 August 1944. Advance began at 0830 with 1st battalion on the right, 3rd battalion on the left, and 2nd battalion in reserve. Regiment was supported by 908th and 324th Field Artillery battalions, Company C, 86 Chemical battalion, Company B, 705 Tank Destroyer battalion (SP) and Company C, 308th Engineers. Resistance was light, but great difficulty was encountered in two (2) canals that ran across the front of the regiment about six (6) kilometers to northeast of area of departure.
6 August 1944, Company I succeeded in reaching the outskirts of St. Meloir. The 1st battalion did not succeed in reaching the crossroads at Villegantier. By 1010, the 2nd battalion had advanced to vicinity of Tertoebal. Company A reported no hostile troops in Coulomb or Cancale. Company A was instructed to advance on Labas (857165). Infantry resistance was light and scattered. Long range artillery and naval gun fire were the principal means of enemy resistance.
7 August 1944, the attack was resumed at 0630. The 1st battalion was to advance on La Bastille and La Fresne, the 2nd battalion on St. Ideuc. Heavy fog obscured enemy ground targets and made artillery support difficult until 0830.
8 August 1944, the 2nd battalion resumed the attack at 0830 with Companies E and F in an attempt to reduce the strong point at St. Ideuc. No progress was made; Company G was ordered to pass through Company E, but was unsuccessful. Company G then attempted to go around the south flank. Completion of movement was stopped by fire.
The 3rd battalion, attached to the 330th Infantry, was during the day, pushed in on the right of the 330th Infantry to the west of Parame. By dark, Companies I, K, and L were well into the eastern outskirts of St. Malo followed by Companies F and G.
2nd battalion reported slight gains against St. Ideuc, including capture of an 88 gun and crew. Five hundred thirty-nine (539) prisoners were captured during the day. During the period 5--9 August 1944, nine hundred fifty (950) prisoners were captured. Approximately five hundred (500) others were captured on the 8th and 9th but reached other prisoner of war inclosures.
12 August 1944, the attack was resumed at 0900, with the mision of seizing the village of Pleurtuit, contacting 2rd battalion, 121st Infantry and continuing advance to north. Company I followed in column by Company K had reached Pleurtuit by 1700. The 1st battalion, on the left, ran into an enemy strong point of five (5) pillboxes; Companies A and C bypassed these, while B Company began reduction of the strong point. By 2200, Company B had capured one hundred fifty-eight (158) prisoners, five (5) bunkers, two (2) trucks and two (2) trailers, one (1) 88 gun and one (1) Mark IV tank destroyed.
13 August 1944. During the late afternoon, company B broke through the enemy resistance and advanced rapidly across the airfield west of le Bourgneuf. By dark the 3rd battalion and the 2nd battalion 330th Infantry had advanced to the high ground, one (1) kilometer east of Launay in position to make the final attack on Dinard.
14 August 1944, the assault on Dinard began at 0930 and progressed rapidly. By 1400, both assault battalions had reached the shore line in their zone of action and began mopping up. During the afternoon, the 1st battalion was ordered to advance on St. Lunaire and the 2nd battalion on Briac. Operations for the day netted 1200 prisoners, three (3) 150 mm guns, three (3) ammunition dumps and several cannons of various caliber.
17 August 1944, the regiment received new replacements and reorganized. Day spent in instructions of tactics, weapons firing, disciplinary and close order drill.
20 August 1944, regiment (less 2nd battalion) moved to new area southeast of Rennes and occupied bivouacs. Regimental command post established at Vern sur Seiche. Regiment closed in new area at 1830.