In the meantime, the 306th and 307th Infantry Regiments had been ordered to make a series of sweeping envelopments on the Japanese right (west) flank toward Valencia. The 307th Infantry was to move northwest about six and a quarter miles through the barrios of Jalubon, Liloan, and Bao to Catayom on the Bao River, then swing northeast to the barrio of San Jose and continue northeast to the Valencia airstrip. The 306th Infantry was to follow the 307th Infantry northwest and then drive east and cut Highway 2.[7]
The 306th Field Artillery Battalion, though in general support, was to give priority to the 307th Infantry. The 902d and 305th Field Artillery Battalions were to support elements of the reconnaissance troops operating on each flank of the division. The artillery battalions would fire in the regimental zones of action only on call from or with the approval of the regiments.[8]
On 16 December the 307th Infantry crossed the line of departure on time. Since there were no roads and the route was across rice paddies, through waist-deep rivers, and over terrain impassable for vehicles, the troops hand-carried their supplies. Arrangements were also made for Filipinos to carry supplies, and, as the advance progressed, more and more Filipinos joined the column of the 307th Infantry for this purpose.[9] The regiment met only scattered resistance. Some Japanese troops encountered in the vicinity of Liloan were dispersed. At 1525 leading elements of the 307th Infantry passed through Bao and moved on toward San Jose. On the outskirts of that barrio, the troops met and destroyed two platoons of the enemy. At 1645 the 307th Infantry dug in for the night in San Jose. The regiment had covered eight miles, a rapid rate of advance considering the nature of the terrain and the load carried. At 2340 General Bruce told the 307th Infantry that an incendiary air strike would be made on Valencia before 0900 the following day and that the regiment was to hold its present position until further orders.[10]
At 0900 on 16 December the 306th Infantry moved past the initial point of departure on the northwestern edge of Ormoc. At 1035 the regiment was 1,000 yards west of the starting point and close “on the tail” of the 307th Infantry. The 306th waited until the 307th cleared and then moved north. Although it did not encounter any Japanese its progress was very slow because the route of advance ran through deep rice paddies. At 1730 the regiment established its night perimeter about 700 yards south-southwest of Tipic.[11] During the day the 305th Infantry had cleared Cogon and occupied defensive positions around the road junction north of the town.
The Japanese had constructed defensive positions along Highway 2 in the southern part of Ormoc Valley. At the road junction of Highway 2 with the road to Liloan were many trenches three to four feet deep and parallel to the highway. Trenches had also been dug along the sides of a machine gun emplacement that occupied a slight elevation commanding Highway 2 both to the north and to the south. On both sides of the road from Cogon to Catayom foxholes lined Highway 2, in the ditches and under the shacks. Some of these positions were dug on a slant and were six to seven feet deep. At Tambuco the foxholes extended along the highway for 400 yards, with machine gun emplacements on the sides of the foxholes. Other positions along Highway 2 consisted of poorly integrated foxholes and machine guns that covered the road. The field artillery pieces between Tambuco and Catayom were placed along the highway, with the exception of a 75-mm. gun that guarded a bridge and was well concealed inside a roadside shack.[12]
The 14th Area Army had planned to reinforce the 35th Army by dispatching the Takahashi Detachment, which consisted of the 5th Infantry Regiment, one artillery battalion, and one engineer company and one transport company each from the 8th Division, together with the Ito Naval Landing Force of 400 troops from Luzon.
JAPANESE DUG-IN POSITIONS ALONG HIGHWAY BANKS delayed the advance of the 77th Division north of Ormoc.
The 77th Infantry Regiment had landed at Palompon on or about 9 December from Cebu and moved to Matagob where, after assembling its troops, it began to move southeast toward Huaton, the new headquarters of the 35th Army. Huaton was a small barrio on Highway 2 about three and a half miles north of Cogon. On 13 December General Suzuki, the commander of the 35th Army, arrived at Huaton from the Burauen area. After the 12th Independent Infantry Regiment, the 4th Airborne Raiding Regiment, the Mitsui Shipping Unit, the Ito Naval Landing Force, and the 77th Infantry Regiment were assembled, General Suzuki on 15 December ordered an attack, which was to start 17 December, against the American forces in the Ormoc area.[13]
The fall of Cogon and the envelopment to the west forced General Suzuki to change his plans again. The 305th Infantry had captured the positions of the Tateishi Battalion of the 12th Independent Infantry Regiment, and the position of the 77th Infantry Regiment was greatly weakened. As the attack against Ormoc could not be successfully completed, the 12th and 77th Infantry Regiments were to carry out a delaying action.[14]