As the Chinese withdrew northward they left determined NKPA troops behind. The 1st Marine Division moved slowly forward, fighting for every inch of ground. So fierce was the enemy’s resistance that at times during June the division commander was forced to commit all four regiments (the KMCs included) in the attack at the same time in order to seize designated objectives. This was a modification of accepted tactical doctrine, necessitated by the situation.
Throughout March, April, and part of May, Marine pilots continued to provide close air support not only for the 1st Marine Division, but also for other Allied units as directed by JOC. From the beginning of Operation STRANGLE on 20 May this interdiction effort had first priority, and close air support to all infantry units was secondary. Difficulties in air-ground communication continued as radio frequencies were heavily burdened with traffic. Although the 1st Marine Division received a proportionate share of the few air support missions flown, the frustrating time lag between requests for air support and the arrival of planes on target continued into the next year.
Some planes were always available for front line support, although rarely ever enough according to infantrymen’s opinion. When they had the chance, 1st MAW pilots viciously attacked the fleeing enemy to ease the way for advancing ground troops. During June the unrelenting pressure of combined air-ground attacks sometimes caused large groups of enemy to surrender. Marines also captured thousands of rounds of enemy ammunition and other equipment.
By the last week in June the Marines had entrenched themselves along the Division’s assigned portion of the MLR and “caught their breath” after two months of hard fighting. In driving from the Hwachon Reservoir area to the Punchbowl, they had employed practically every weapon and tactic that could be used in an all-out offensive. The Division then settled down to stable positions for a while, and some units had the opportunity to go into reserve and train.
It was a recharged 1st Marine Division (the 5th and 11th Marines did not go into reserve during this period) which moved back into the lines at the end of August. The offensive which opened northeast of the Punchbowl on the 30th and lasted with few and brief interludes until 20 September was the equal of the June fighting in sustained ferocity. All four infantry regiments (including the KMCs) went up against seemingly impregnable opposition.
The enemy’s “stubborn defense of strong positions and many well-placed log and earth bunkers was similar to the tenacious tactics of the Japanese in World War II,” according to a Navy report. “His artillery and mortar fires were effective, his minefields continued to be hazardous for many weeks, and his ability to dig in and fortify his positions [was] always impressive.”[376]
[376] PacFlt Interim Rpt No. 3, 15–25.
After the 20th of September the EUSAK commander ordered that no further offensives be launched and that the MLR be stabilized. This was a period of aggressive patrolling, local attacks for more advantageous pieces of terrain, and watchful waiting to determine the outcome of truce negotiations. In spite of Operation STRANGLE, enemy vehicular movements increased at the end of the year, but 1st MAW pilots continually attempted to provide more support for all the infantry divisions.
The mission of the 1st Marine Division at this time was to organize, construct, and defend its sector of the MLR, a front of more than 13 miles. Although there were heavy local skirmishes, during the latter months of 1951 and the first 3 months of 1952, no great offensive drives were launched. Essentially, the Marines were engaged in an aggressive defense of their positions until they moved to West Korea.
While all Marines were hoping that the conflict would soon end, there was no slackening of the customary vigilance. All hands remembered General Ridgway’s words of the previous year, that it was “... a fight for our own freedom, our own survival ...,”[377] and this was their creed.