thedrifter
01-13-03, 07:09 AM
The 1st MarDiv command post was moved to Hungnam on November 4, with the 7th and 5th Marines operating north, closing the "stretch" to less than 60 miles. Wonsan, from the viewpoint of Marine Aviation, was looking like a bypassed Japanese base from WW Il. The concentration of the division north of Hungnam, in its march to the Yalu River, made the airfield at Yonpo increasingly attractive to the 1st MAW because it was in the center of the Hungnam-Hamhung area. This meant that response times for close air support would be considerably reduced. On November 6, MAG-33 was ordered to Yonpo from Japan, and was operating there by November 10, in time to receive VMF-212 from Wonsan. On the 15th, VMF-214 was ordered ashore from Sicily and set up at Wonsan with MAG-12 supporting the squadron as best it could.
By November 27, the 1st MarDiv was concentrated in the vicinity of the Chosin Reservoir, with the command post at Hagaru, the 7th and 5th Marines at Yudamni, and the 1st Marines along the main supply route with a battalion each at Chinhung-ni, Koto-ri and Hagaru. 27
On the morning of the 27th, the 1st MarDiv began its attack from Yudam-ni on schedule, but the lead regiment had only advanced about 2,000 yards when it was stopped by stiff resistance. That night, the Chinese communist forces attacked in great strength at all Marine positions from Yudam-ni Intelligence reports showed opposing the Marines and associated troops in the Chosin Reservoir area was the Chinese 9th Army Group, 3rd Field Army. This force, added divisions already identified by the 1st MarDiv, totaled more than 100,000 seasoned Chinese infantry troops. With the disposition of the 1st MarDiv north of Hungnam and Hamhung, plus attacked units of Royal Marines and assorted Army units totaling only 20,500, the balance in the two orders favored the Chinese by better than five to one.
Withdrawal
The situation had changed so radically and quickly that, on November 28, Gen. MacArthur called Generals Walker and Almond to Tokyo for a conference. The result of deliberations was a change of strategy to abandon the previous plan for North Korea and pull back instead to a more defensible line to the south. General Smith had already decided moving without any further delay, and ordered the 5th and 7th Marines to move back to Hagaru from Yudam-ni, the first leg of what would be a 68-mile fight through more than 100,000 fanatical enemy troops.
The 1st MAW comm and attached headquarters and service units, plus five VMFs had moved to Yonpo from Wonsan and Japan by late November. The sixth squadron, VMF-323, was still operating from Badoeng Strait. Rounding out the 1st MarDiv combat line-up was VMO-6 with its OYs and H helicopters, operating from Yon mainly, but also from wherever else required. The air part of the air-ground team was ready to do its job. The manner in which it performed its task compares with what Marine Aviation did on Guadalcanal.
From the time the decision was made to fight south to the sea, 5th AF had given 1st MAW the sole mission of supporting the 1st MarDiv and the rest of X Corps. Task Force (TF) 77 aircraft provided backup for additional close support while Navy and 5th AF tactical squadrons attacked troop concentra interdicted approach routes all along the withdrawal fronts of 8th Army and X Corps.
Tactical Air Control during the Withdrawal
When reviewing the fighting withdrawal of the Marine team from the Chosin Reservoir against terrible odds, and assessing the part Marine Aviation played in the operation, it is important to remember the tactical air control party (TACP) structure of the Marine air control system. Every strike against enemy positions along the route, wherever the column was held up or pinned down, was under the direct control of an experienced Marine pilot on the ground in the column, known to the pilots in the air delivering the attack. Other methods have been tried repeatedly, but there is no substitute for the TACP.
From the start of the 68-mile battle to the sea on December 1, to its completion at Hungnam on December 12, so much happened on a daily basis that only shelves of books could tell the story in detail. The same air support principles in almost every detail were followed in support of the division on its fight up to Hagaru and Yudam-ni, as were applied in supporting its fight back down to the sea. The air support plan for the operation called for a flight over the key movement of the day at first light. This initial would be assigned to the forward air controller (FAC) of the unit most likely to need close air support first. As that flight was called in, another flight would be assigned to relieve it on station. This meant that response times from request to delivery on target could be reduced to the minimum. If the aircraft on station did not eliminate that target,additional strength would be called in, either from Yonpo or from TF-77. From time to time, an suitable aircraft in the area would be diverted from its assigned mission and called in.
Each night, the column would be defended through unit assignments to key perimeters of defense. During daylight, when Corsairs were on station, the Chinese could not mass their troops to mount such attacks because, when they tried, they were immediately subjected to devastating air strikes with napalm, bombs, rockets and overwhelming 20mm strafing. Not one enemy mass attack was delivered against the column during daylight hours.
Yudam-ni to Hagaru
The first leg of the fight south was from Yudam-ni to Hagaru, a movement which brought the 5th and 7th Marines together with elements of the 1st Marines, 1st MarDiv headquarters and the division command post. It was essential that Hagaru be held because it would give the division its first chance to evacuate the seriously wounded by air. During the period from the first airstrip landing on December 1, to December 6, the Combat Cargo Command (CCC) C-47s, augmented by every Marine R4D in the area, flew out a total of 4,312 wounded, including 3,150 Marines, 1,137 Army personnel and 25 Royal Marines.
Hagaru to Koto-ri
The Yudam-ni to Hagaru leg was completed by the afternoon of December 4. With most of the heavy action taking place on the 1st and 2nd, 1st MAW aircraft flew well over 100 close support sorties both days, in support of the division and the three Army battalions of the 7th Division which were heavily hit east of the reservoir trying to withdraw to Hagaru. On December 4 and 5, 1st MAW aircraft continued the march with almost 300 sorties against enemy positions, vehicles, and troop concentrations throughout the reservoir area. But on December 6, they resumed their primary role over the division as the second leg, Hagaru to Koto-ri, began.
Air planning for the second leg drew heavily on the experience gained during the move from Yudam-ni. The FACs were again spotted along the column and with each flanking battalion, and were augmented with two airborne TACs who flew their Corsairs ahead and to each side of the advancing column. A four-engined R5D (C-54) transport, especially configured to carry a complete tactical air direction center (TADC), controlled all support aircraft as they reported on station, and assigned them to the various FACs or TACs, as appropriate for the missions requested. The system worked smoothly and made it possible for the column to keep moving on the road most of the time, even while the support aircraft were eliminating a hot spot.
By evening of December 7, the division rear guard was inside the perimeter of the 2nd Battalion, 1st Marines at Koto-ri. For the two days, 1st MAW aircraft flew a total of 240 sorties in support of the X Corps withdrawal, with 60 percent in support of the division. Most of the remainder was flown in support of other units in the column. In addition, X Corps was supported by 245 sorties from TF-77 carriers and 83 from the 5th AF. The Navy sorties were almost entirely close support, and the Air Force mostly supply drops.
Koto-ri to Chinhung-ni
With just one more leg to go, the move was almost completed, but the third leg, Koto-ri to Chinhung-ni, was tough to contemplate. It involved the hazardous passage of a precipitous defile called Funchilin Pass, plus a blown bridge just three miles from Koto-ri that had to be made passable, the test drop of a bridge section at Yonpo (as an experiment), revision of parachutes and rigging, and the successful drops of the necessary material at Koto-ri.
The air and ground plans for the descent to Chinhung-ni involved the same coverage and column movement coordination as had been so successful on the first two legs. The night of December 7 brought a raging blizzard to the area, reducing visibility almost to zero and denying any air operations on most of the 8th. As a result, little progress was made from Koto-ri and installation of the bridge sections was delayed.
The night of the 8th saw the end of the weather problem, and the clear skies and good visibility promised a full day for the 9th. From the break of day, there was complete air coverage over the main supply route under the direction of the airborne TADC, the TACs and the battalion FACs. The installation of the bridge was covered and, when it was in place, the column began its move down to Chinhung-ni on the plain below. It is interesting to note that the bridge was installed at the base of the penstocks of one of several hydroelectric plants fed by the Reservoir. Eighteen months later, in June 1952, two of these plants were totally destroyed by MAGs 12 and 33 in one attack, Chosin Three by MAG-12 and Chosin Four by MAG-33, the latter in one of the largest mass jet attacks of the war.
http://www.acepilots.com/usmc/corsair_korea.jpg
continued.........
By November 27, the 1st MarDiv was concentrated in the vicinity of the Chosin Reservoir, with the command post at Hagaru, the 7th and 5th Marines at Yudamni, and the 1st Marines along the main supply route with a battalion each at Chinhung-ni, Koto-ri and Hagaru. 27
On the morning of the 27th, the 1st MarDiv began its attack from Yudam-ni on schedule, but the lead regiment had only advanced about 2,000 yards when it was stopped by stiff resistance. That night, the Chinese communist forces attacked in great strength at all Marine positions from Yudam-ni Intelligence reports showed opposing the Marines and associated troops in the Chosin Reservoir area was the Chinese 9th Army Group, 3rd Field Army. This force, added divisions already identified by the 1st MarDiv, totaled more than 100,000 seasoned Chinese infantry troops. With the disposition of the 1st MarDiv north of Hungnam and Hamhung, plus attacked units of Royal Marines and assorted Army units totaling only 20,500, the balance in the two orders favored the Chinese by better than five to one.
Withdrawal
The situation had changed so radically and quickly that, on November 28, Gen. MacArthur called Generals Walker and Almond to Tokyo for a conference. The result of deliberations was a change of strategy to abandon the previous plan for North Korea and pull back instead to a more defensible line to the south. General Smith had already decided moving without any further delay, and ordered the 5th and 7th Marines to move back to Hagaru from Yudam-ni, the first leg of what would be a 68-mile fight through more than 100,000 fanatical enemy troops.
The 1st MAW comm and attached headquarters and service units, plus five VMFs had moved to Yonpo from Wonsan and Japan by late November. The sixth squadron, VMF-323, was still operating from Badoeng Strait. Rounding out the 1st MarDiv combat line-up was VMO-6 with its OYs and H helicopters, operating from Yon mainly, but also from wherever else required. The air part of the air-ground team was ready to do its job. The manner in which it performed its task compares with what Marine Aviation did on Guadalcanal.
From the time the decision was made to fight south to the sea, 5th AF had given 1st MAW the sole mission of supporting the 1st MarDiv and the rest of X Corps. Task Force (TF) 77 aircraft provided backup for additional close support while Navy and 5th AF tactical squadrons attacked troop concentra interdicted approach routes all along the withdrawal fronts of 8th Army and X Corps.
Tactical Air Control during the Withdrawal
When reviewing the fighting withdrawal of the Marine team from the Chosin Reservoir against terrible odds, and assessing the part Marine Aviation played in the operation, it is important to remember the tactical air control party (TACP) structure of the Marine air control system. Every strike against enemy positions along the route, wherever the column was held up or pinned down, was under the direct control of an experienced Marine pilot on the ground in the column, known to the pilots in the air delivering the attack. Other methods have been tried repeatedly, but there is no substitute for the TACP.
From the start of the 68-mile battle to the sea on December 1, to its completion at Hungnam on December 12, so much happened on a daily basis that only shelves of books could tell the story in detail. The same air support principles in almost every detail were followed in support of the division on its fight up to Hagaru and Yudam-ni, as were applied in supporting its fight back down to the sea. The air support plan for the operation called for a flight over the key movement of the day at first light. This initial would be assigned to the forward air controller (FAC) of the unit most likely to need close air support first. As that flight was called in, another flight would be assigned to relieve it on station. This meant that response times from request to delivery on target could be reduced to the minimum. If the aircraft on station did not eliminate that target,additional strength would be called in, either from Yonpo or from TF-77. From time to time, an suitable aircraft in the area would be diverted from its assigned mission and called in.
Each night, the column would be defended through unit assignments to key perimeters of defense. During daylight, when Corsairs were on station, the Chinese could not mass their troops to mount such attacks because, when they tried, they were immediately subjected to devastating air strikes with napalm, bombs, rockets and overwhelming 20mm strafing. Not one enemy mass attack was delivered against the column during daylight hours.
Yudam-ni to Hagaru
The first leg of the fight south was from Yudam-ni to Hagaru, a movement which brought the 5th and 7th Marines together with elements of the 1st Marines, 1st MarDiv headquarters and the division command post. It was essential that Hagaru be held because it would give the division its first chance to evacuate the seriously wounded by air. During the period from the first airstrip landing on December 1, to December 6, the Combat Cargo Command (CCC) C-47s, augmented by every Marine R4D in the area, flew out a total of 4,312 wounded, including 3,150 Marines, 1,137 Army personnel and 25 Royal Marines.
Hagaru to Koto-ri
The Yudam-ni to Hagaru leg was completed by the afternoon of December 4. With most of the heavy action taking place on the 1st and 2nd, 1st MAW aircraft flew well over 100 close support sorties both days, in support of the division and the three Army battalions of the 7th Division which were heavily hit east of the reservoir trying to withdraw to Hagaru. On December 4 and 5, 1st MAW aircraft continued the march with almost 300 sorties against enemy positions, vehicles, and troop concentrations throughout the reservoir area. But on December 6, they resumed their primary role over the division as the second leg, Hagaru to Koto-ri, began.
Air planning for the second leg drew heavily on the experience gained during the move from Yudam-ni. The FACs were again spotted along the column and with each flanking battalion, and were augmented with two airborne TACs who flew their Corsairs ahead and to each side of the advancing column. A four-engined R5D (C-54) transport, especially configured to carry a complete tactical air direction center (TADC), controlled all support aircraft as they reported on station, and assigned them to the various FACs or TACs, as appropriate for the missions requested. The system worked smoothly and made it possible for the column to keep moving on the road most of the time, even while the support aircraft were eliminating a hot spot.
By evening of December 7, the division rear guard was inside the perimeter of the 2nd Battalion, 1st Marines at Koto-ri. For the two days, 1st MAW aircraft flew a total of 240 sorties in support of the X Corps withdrawal, with 60 percent in support of the division. Most of the remainder was flown in support of other units in the column. In addition, X Corps was supported by 245 sorties from TF-77 carriers and 83 from the 5th AF. The Navy sorties were almost entirely close support, and the Air Force mostly supply drops.
Koto-ri to Chinhung-ni
With just one more leg to go, the move was almost completed, but the third leg, Koto-ri to Chinhung-ni, was tough to contemplate. It involved the hazardous passage of a precipitous defile called Funchilin Pass, plus a blown bridge just three miles from Koto-ri that had to be made passable, the test drop of a bridge section at Yonpo (as an experiment), revision of parachutes and rigging, and the successful drops of the necessary material at Koto-ri.
The air and ground plans for the descent to Chinhung-ni involved the same coverage and column movement coordination as had been so successful on the first two legs. The night of December 7 brought a raging blizzard to the area, reducing visibility almost to zero and denying any air operations on most of the 8th. As a result, little progress was made from Koto-ri and installation of the bridge sections was delayed.
The night of the 8th saw the end of the weather problem, and the clear skies and good visibility promised a full day for the 9th. From the break of day, there was complete air coverage over the main supply route under the direction of the airborne TADC, the TACs and the battalion FACs. The installation of the bridge was covered and, when it was in place, the column began its move down to Chinhung-ni on the plain below. It is interesting to note that the bridge was installed at the base of the penstocks of one of several hydroelectric plants fed by the Reservoir. Eighteen months later, in June 1952, two of these plants were totally destroyed by MAGs 12 and 33 in one attack, Chosin Three by MAG-12 and Chosin Four by MAG-33, the latter in one of the largest mass jet attacks of the war.
http://www.acepilots.com/usmc/corsair_korea.jpg
continued.........