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Lucky13
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September 1950
In early September as during August, General Walker faced dangerous situations in essentially the same places along the Pusan Perimeter: in the east at P'ohang-dong to include a potential severing of the corridor between Taegu and P'ohang-dong, north of Taegu where the enemy made disturbing gains, at the Naktong Bulge, and in the Masan area in the extreme south. Also as he had during the fighting in August, Walker continued his masterful tactics of shifting his forces from one threatened enemy penetration to another. In early September the ROK 3d, Capital, 8th, and 6th Divisions held the line farthest to the east against the North Korean 5th, 8th, 12th, and 15th Divisions. Maj. Gen. John B. Coulter, newly appointed deputy commander, Eighth Army, assumed command of American units in the eastern sector and employed the 21st Infantry of the U.S. 24th Division and other supporting units to bolster the ROK divisions. On 7 September General Church replaced Coulter as American commander in the eastern sector after General Walker ordered the entire 24th to reinforce the ROK divisions. A combination of ground fighting, predominantly by the South Koreans, along with American close air support and naval gunfire from offshore inflicted serious losses on the North Korean divisions. The North Korean 1st, 3d, and 13th Divisions pressed the attack north of Taegu against the U.S. 1st Cavalry Division, which prompted Walker on 5 September to move the main Eighth Army headquarters from Taegu to Pusan. The 1st Cavalry Division essentially checked the thrusts of the North Koreans north of Taegu, but fighting continued there into mid-September.
At the end of August the North Korean People's Army also planned a crushing blow against the U.S. 2d and 25th Divisions in the southern part of the Pusan Perimeter. The North Korean 6th Division would attack through Haman, Masan, and capture Kimhae, fifteen miles west of Pusan. The 7th Division was to strike north of the Masan highway, wheel left to the Naktong River, and wait for the 6th Division on its right and the 9th on its left and then resume the attack toward Pusan. The 25th Division held the southernmost sector that ran from the confluence of the Naktong and Nam Rivers to the southern coast, while the 2d Division was positioned in the area across the Naktong River north of the 25th. The North Korean 9th Division faced the 2d Division at the Naktong Bulge and had the mission of capturing the towns of Miryang and Samnangjin, thereby cutting off the Eighth Army route of withdrawal between Taegu and Pusan. During the first week of September the 9th Division penetrated the Naktong Bulge as far east as Yongsan, but a counterattack by the 2d Division together with the U.S. 1st Provisional Marine Brigade pushed back the 9th almost to the Naktong River. The 2d Division's 23d Infantry beat back the North Korean 2d Division six miles north of Yongsan at Changnyong. At the same time the 6th and 7th Divisions mounted strong attacks against the 25th Division. Despite enemy penetrations into the sectors of the 25th's regiments—the 35th Infantry's sector west of Ch'irwon and the 24th Infantry's sector near Haman that was effectively stopped by the 27th Infantry—the 25th Division repelled the NKPA's offensive in the south. The Naktong River line held, and the Pusan Perimeter was secure.
Analysis
Within the space of a few months in 1950, the United States had taken the big leap from attaching no strategic importance to Korea to active involvement there in a major armed conflict. Its active Army of 591,000 had been focused on Soviet intentions in western Europe and occupation duty in Europe and the Far East. The four divisions under MacArthur's Far East Command in Japan were performing primarily occupation duties, and their actual readiness level for conventional combat was even lower than their marginal statistical ratings indicated. Each of MacArthur's divisions was about 7,000 men short of its authorized strength of 18,900, and none of them had received any new equipment since World War II. MacArthur had not fully supported development of the ROK Army, and in 1948 he had suggested merely expanding the ROK Constabulary. When the ROK minister of defense in 1949 requested M26 Pershing tanks from America, the KMAG argued that the Korean terrain and roads would not allow tank operations, a clearly inaccurate prediction of the Soviet T34 tank's performance in South Korea during the war's early stages. When USAFIK withdrew from South Korea in 1949, it did transfer to the ROK Army individual weapons and equipment sufficient for 50,000 men, but these small arms were incapable of repelling enemy armored attacks.
America failed to anticipate the North Korean invasion, and KMAG erred in concluding that the ROK Army could withstand an invasion if it happened. Nevertheless, when the attack came the United States decided to intervene on behalf of South Korea. President Truman authorized air and naval support early in the conflict and the progressive introduction of ground troops. The defeat of Task Force Smith underscored the importance of adequate prewar training along with armored and air support in combat operations. Further, MacArthur underestimated the skill and determination of the North Koreans but recognized his error when he concluded that more than four U.S. divisions were needed to defeat the enemy. The combined efforts of the U.S. and ROK Armies led by General Walker, complemented by air and naval superiority, slowed the southward drive of the North Koreans and ended in a difficult but successful defense of the Pusan Perimeter. The fighting was intense as reflected in American casualties to mid-September 1950—4,599 battle deaths, 12,058 wounded, 401 reported captured, and 2,107 reported missing in action. The bitter weeks of retreat and death would soon change, however, with MacArthur's "hammer against the anvil": the breakout from the Pusan Perimeter coupled with the landing at Inch'on by the 1st Marine Division and the Army's 7th Infantry Division during the third week of September.
In early September as during August, General Walker faced dangerous situations in essentially the same places along the Pusan Perimeter: in the east at P'ohang-dong to include a potential severing of the corridor between Taegu and P'ohang-dong, north of Taegu where the enemy made disturbing gains, at the Naktong Bulge, and in the Masan area in the extreme south. Also as he had during the fighting in August, Walker continued his masterful tactics of shifting his forces from one threatened enemy penetration to another. In early September the ROK 3d, Capital, 8th, and 6th Divisions held the line farthest to the east against the North Korean 5th, 8th, 12th, and 15th Divisions. Maj. Gen. John B. Coulter, newly appointed deputy commander, Eighth Army, assumed command of American units in the eastern sector and employed the 21st Infantry of the U.S. 24th Division and other supporting units to bolster the ROK divisions. On 7 September General Church replaced Coulter as American commander in the eastern sector after General Walker ordered the entire 24th to reinforce the ROK divisions. A combination of ground fighting, predominantly by the South Koreans, along with American close air support and naval gunfire from offshore inflicted serious losses on the North Korean divisions. The North Korean 1st, 3d, and 13th Divisions pressed the attack north of Taegu against the U.S. 1st Cavalry Division, which prompted Walker on 5 September to move the main Eighth Army headquarters from Taegu to Pusan. The 1st Cavalry Division essentially checked the thrusts of the North Koreans north of Taegu, but fighting continued there into mid-September.
At the end of August the North Korean People's Army also planned a crushing blow against the U.S. 2d and 25th Divisions in the southern part of the Pusan Perimeter. The North Korean 6th Division would attack through Haman, Masan, and capture Kimhae, fifteen miles west of Pusan. The 7th Division was to strike north of the Masan highway, wheel left to the Naktong River, and wait for the 6th Division on its right and the 9th on its left and then resume the attack toward Pusan. The 25th Division held the southernmost sector that ran from the confluence of the Naktong and Nam Rivers to the southern coast, while the 2d Division was positioned in the area across the Naktong River north of the 25th. The North Korean 9th Division faced the 2d Division at the Naktong Bulge and had the mission of capturing the towns of Miryang and Samnangjin, thereby cutting off the Eighth Army route of withdrawal between Taegu and Pusan. During the first week of September the 9th Division penetrated the Naktong Bulge as far east as Yongsan, but a counterattack by the 2d Division together with the U.S. 1st Provisional Marine Brigade pushed back the 9th almost to the Naktong River. The 2d Division's 23d Infantry beat back the North Korean 2d Division six miles north of Yongsan at Changnyong. At the same time the 6th and 7th Divisions mounted strong attacks against the 25th Division. Despite enemy penetrations into the sectors of the 25th's regiments—the 35th Infantry's sector west of Ch'irwon and the 24th Infantry's sector near Haman that was effectively stopped by the 27th Infantry—the 25th Division repelled the NKPA's offensive in the south. The Naktong River line held, and the Pusan Perimeter was secure.
Analysis
Within the space of a few months in 1950, the United States had taken the big leap from attaching no strategic importance to Korea to active involvement there in a major armed conflict. Its active Army of 591,000 had been focused on Soviet intentions in western Europe and occupation duty in Europe and the Far East. The four divisions under MacArthur's Far East Command in Japan were performing primarily occupation duties, and their actual readiness level for conventional combat was even lower than their marginal statistical ratings indicated. Each of MacArthur's divisions was about 7,000 men short of its authorized strength of 18,900, and none of them had received any new equipment since World War II. MacArthur had not fully supported development of the ROK Army, and in 1948 he had suggested merely expanding the ROK Constabulary. When the ROK minister of defense in 1949 requested M26 Pershing tanks from America, the KMAG argued that the Korean terrain and roads would not allow tank operations, a clearly inaccurate prediction of the Soviet T34 tank's performance in South Korea during the war's early stages. When USAFIK withdrew from South Korea in 1949, it did transfer to the ROK Army individual weapons and equipment sufficient for 50,000 men, but these small arms were incapable of repelling enemy armored attacks.
America failed to anticipate the North Korean invasion, and KMAG erred in concluding that the ROK Army could withstand an invasion if it happened. Nevertheless, when the attack came the United States decided to intervene on behalf of South Korea. President Truman authorized air and naval support early in the conflict and the progressive introduction of ground troops. The defeat of Task Force Smith underscored the importance of adequate prewar training along with armored and air support in combat operations. Further, MacArthur underestimated the skill and determination of the North Koreans but recognized his error when he concluded that more than four U.S. divisions were needed to defeat the enemy. The combined efforts of the U.S. and ROK Armies led by General Walker, complemented by air and naval superiority, slowed the southward drive of the North Koreans and ended in a difficult but successful defense of the Pusan Perimeter. The fighting was intense as reflected in American casualties to mid-September 1950—4,599 battle deaths, 12,058 wounded, 401 reported captured, and 2,107 reported missing in action. The bitter weeks of retreat and death would soon change, however, with MacArthur's "hammer against the anvil": the breakout from the Pusan Perimeter coupled with the landing at Inch'on by the 1st Marine Division and the Army's 7th Infantry Division during the third week of September.