Chapter II

and ECIDE map.

[471] ECIDE ComdD, Oct 2, p. 1.

Individual island commanders were responsible for the defense of their small parcels of seaborne real estate, control of both defensive and offensive NGF missions in the area, and evaluation of intelligence regarding enemy troop locations, the movement of supplies north, or new emplacements of hostile guns. Fire support for the ECIDU islands, exposed to the enemy shore batteries above the 39th Parallel, was available from Task Force 95, which maintained a task, group of ships off both the east and west coasts. Aircraft and ships of Task Force 77 (Seventh Fleet Striking Force), operating off the East Korean coastline, were also on call. In December, for instance, the Corsairs of TF 77 had resumed their rail-bridge interdiction. All-out attacks on railroad and highway bridges, as well as bombing runs on the 90-mile stretch of east coast railroad from Hungnam to Songjin, were undertaken to cut off supplies being moved north for Communist industrial use.

February marked the second anniversary of the siege of Wonsan by the UNC, the longest blockade of a port in recent U.S. history. Some naval authorities by this time argued that the venture had become one of doubtful merit which “should never have been undertaken, but its long history made it difficult to abandon without apparent admission of defeat.”[472] In any event, the month also signaled increasing attention paid by hostile shore batteries to the little island enclave. For seven consecutive days, 9–15 February, the harbor islands were targets for enemy mixed artillery and mortar shells. Minor materiel damage and casualties were sustained at Yo-do during a Valentine’s Day bombardment, 14 February.

[472] Field, _NavOps, Korea_, p. 434.

Altogether, the enemy harassed the harbor islands for 16 days during the month, expending 316 rounds, compared with 11 days in January. Hostile fire, not limited to the Wonsan Harbor islands, was also directed against friendly ships USS _DeHaven_ and USS _Moore_. These provided counterbattery fire and were, in turn, fired upon, the nearest shells landing only 400 yards from the two vessels. This attack, also on 14 February, was described as an “unusually determined and precise”[473] effort. The enemy, moreover, did not appear to take his usual precautions with respect to disclosing his positions. The fact that a Communist shore battery would cease fire when subjected to friendly counterbattery, with other positions then immediately taking up the delivery, “indicated some sort of central control for the first time.”[474] The I Corps, NKPA artillery units across from the Wonsan Island command revealed the “heavy, effective artillery capability of enemy batteries which encircle Wonsan Harbor.”[475]

[473] _PacFlt EvalRpt_ No. 6, Chap. 2, p. 2-5.

[474] _Ibid._

[475] ECIDE(U) ComdD, Feb 53, p. 1. Seventh Fleet intelligence estimated that there were no less than “21 active batteries emplaced on Wonsan Bay and within range of our islands.” _Heinl ltr._

Unseasonably good weather the latter part of February improved the transportation and supply situation. With the bitter cold and wind subsiding, maintenance crews could repair the ravages of the past several months. Craft, up to LCVP size, were hoisted in on a large pontoon for repair. For most of December and January, “this small, physically remote Marine Corps command,”[476] as the ECIDU commander, Lieutenant Colonel Robert D. Heinl, Jr. himself described it, had been snowbound. Winds howled in excess of 40 knots, and temperatures dropped to 10° below at night. Personnel at the command island, Yo-do, subsisted on C rations for eight days. With boating operations suspended because of the high winds, it was not possible to send supplies or water to Hwangto-do which for several days relied solely on melted snow.

[476] ECIDE(U) ComdD, Jan 53, p. 3.

The prolonged foul weather, moreover, interrupted all classified radio communications between the ECIDU and the outside world. Crypto guard for the Wonsan islands was maintained by elements of the East Coast TG 95. Coded and decoded security radio messages had to be picked up by patrol boat which could not reach the islands during extreme conditions of icy seas and heavy snows.

As with the men on the front line, the Communists stepped up their pressure and gunfire against the island command Marines during March. The record[477] 524 rounds which fell on the ECIDU islands in March doubled the following month when the command received 1,050 rounds from active mainland batteries. In April the persistent NKPA artillerymen kept up a continuing bombardment of the eastern coastal UNC islands, missing only three days of the entire month, that caused nine casualties when a direct hit was made on the Tae-do CP bunker. It was the highest rate of incoming since UN occupation of the islands. Another April record was enemy mine laying, which increased sharply in both the WCIDU and ECIDU command areas. A total of 37 mines were sighted, the highest number since August 1952. Communist shore gunners, in addition to harassment of the island themselves, fired 2,091 rounds against TF 95 ships, another all-time high.

[477] Another record at this time was the spate of senior visiting officers. Seven times during the month no less than 15 flag and general officers had taken their turn inspecting the ECIDU command headquarters at Yo-do. Services represented were the Marine Corps, U.S. Army, Korean Marine Corps, ROK Navy, and ROK Army. “One local statistician computed the total number of stars for the month (one side of the collar only) as 38,” the monthly report brightly noted. This was believed possibly an all-time high for any headquarters in the Korean theater, short of the Eighth Army. ECIDE(U) ComdD, Mar 53, p. 1.

With respect to personnel, the situation had improved markedly. An increase in ECIDU command strength authorized by CG, FMFPac in March provided for an additional 9 Marine officers, 38 enlisted Marines, and 6 Navy personnel. These were exclusive of the current detachments of 1st ANGLICO shore party and naval maintenance personnel, and represented nearly a 40 percent strength increase.[478] Not long afterward the new ECIDU commander, Lieutenant Colonel Hoyt U. Bookhart, Jr., arrived to succeed Lieutenant Colonel Heinl, who had held the position since the preceding November.

[478] The previous T/O for the ECIDU was 5 officers and 30 enlisted USMC, 15 USN attached primarily to the Navy maintenance unit, and 55 officers and 1,217 enlisted KMCs.

As with the WCIDU force, by late spring it appeared that the days of UNC control and occupation of the east coast islands were numbered. In view of the imminent armistice, a CinCFE directive of 11 June called for the evacuation of all civilians, supplies, and equipment “in excess of immediate needs.”[479] This was a preliminary step towards full evacuation of the islands once the armistice agreement was reached. Accordingly, on 11 June, as evacuation of the friendly west coast partisans got under way, villagers from Yo-do, the largest and ECIDU headquarters site, and the far northern island of Yang-do were similarly moved south. The evacuation was completed by mid-June.

[479] ECIDE(U) ComdD, Jun 53, p. 1.

_The Division is Ordered Back to the Front_[480]

[480] Unless otherwise noted, the material in this section is derived from: _PacFlt EvalRpt_ No. 6, Chap. 9; 1stMarDiv, 1stMar, 5thMar, 7thMar ComdDs, Jun 53.

A rash of political activity in June markedly affected the tenor of military operations in Korea. Intensified Communist aggression broke out north of ROK sectors in the Eighth Army line, largely as a reaction to President Rhee’s unprecedented action on 18 June of freeing, with the help of ROK guards, approximately 25,000 North Korean anti-Communist prisoners at POW camps in the south. Other anti-Communist POWs at Camp No. 10, near Ascom City, staged violent break-out attempts at that same time and Company A, 1st Amphibian Tractor Battalion passed to operational control of the camp commanding officer there to help prevent a repetition of any such incidents in the future. Following a recess of truce talks, pending a clarification of the status of the current military-diplomatic agreements, key delegates held crisis meetings at Panmunjom and Tokyo to get the beleaguered talks back on track.

Despite the furor, signing of the armistice agreement was expected shortly. As a result, the Munsan-ni Provisional Command was reorganized with the 1st Marine Division assigned the responsibility of reactivating the United Nations Personnel and Medical Processing Unit for the anticipated post-truce exchange of prisoners of war. This was to be conducted along lines similar to that for Operation LITTLE SWITCH, the initial limited exchange. The Division Inspector was named processing unit commander and functional sections (S-1, S-2, S-3, S-4, interpreters, messing, medical, engineer) were also activated. As the division training tour in I Corps reserve drew to a close, a number of regimental CPXs were held during June. And the 5th Marines drew a new assignment: training in riot control. Following civilian demonstrations that had erupted in various populated areas of Eighth Army, including the I Corps sector, the regiment was ordered “to be prepared to move in battalion size increments, to be employed as army service area reserve in suppression of civil disturbances anywhere in army service area.”[481]

[481] 5thMar ComdD, Jun 53, p. 1.

While the Marine infantry regiments concluded their training period, the 1st Tank Battalion, Kimpo Provisional Regiment, and Division Reconnaissance Company remained under operational control of the frontline U.S. 25th Infantry Division. Marine artillerymen likewise continued under orders of CG, I Corps Artillery, in the forward area, reinforcing division artillery fires. Tentative plans were underway for movement of the 1st Marine Division back to its former position on the MLR in early July. After the signing of the cease-fire, the division would comply with provisions of the truce agreement by closing out its former MLR and withdrawing to designated positions two kilometers south of the former defensive positions.

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