Battle of Pusan Perimeter

Pusan PerimeterBattle of the Pusan PerimeterUN Defensivealong the Naktong RiverbattleBattle of Busan Perimeterbreakout from the Busan Perimeterbreakout from the Pusan Perimeterdefence of the Pusan Perimeterdefense of Pusan Perimeter
The Battle of the Pusan Perimeter was a large-scale battle between United Nations Command (UN) and North Korean forces lasting from August 4 to September 18, 1950.wikipedia
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Korean War

KoreaKoreanKorea War
It was one of the first major engagements of the Korean War.
As a result, the ROKA and US troops retreated to a small area behind a defensive line known as the Pusan Perimeter.

Daegu

Daegu, South KoreaTaeguDaegu Metropolitan City
The UN troops, consisting mostly of forces from the Republic of Korea Army (ROK), United States, and United Kingdom mounted a last stand around the perimeter, fighting off repeated KPA attacks for six weeks as they were engaged around the cities of Daegu, Masan, and Pohang and the Nakdong River.
Daegu sat inside the Pusan Perimeter, however, so remained in South Korean hands throughout the war.

25th Infantry Division (United States)

25th Infantry Division3rd Brigade, 25th Infantry Division25th Division
Under it were three weak US divisions; the 24th Infantry Division was brought to the country early in July, while the 1st Cavalry Division and 25th Infantry Division arrived between July 14 and 18.
When the Korean War began in June 1950, the division was deployed to Korea, where it fought in the defense of and the breakout from the Pusan Perimeter in mid-1950, with elements advancing as far as the Yalu River in November.

Battle of Taejon

attacked the Kum River linefighting near DaejonTaejon
The 24th Division, the first US division committed, took heavy losses in the Battle of Taejon in mid-July, which they were driven from after heavy fighting.
Although they could not hold the city, the 24th Infantry Division achieved a strategic victory by delaying the North Koreans, providing time for other U.S. divisions to establish a defensive perimeter around Pusan further south.

Busan

PusanBusan, South KoreaBusan Metropolitan City
UN forces, having been repeatedly defeated by the advancing KPA, were forced back to the "Pusan Perimeter", a 140 mi defensive line around an area on the southeastern tip of South Korea that included the port of Busan.
UN troops established a defensive perimeter around the city known as the Pusan Perimeter in the summer and autumn of 1950.

I Corps (South Korea)

I CorpsROK I CorpsFirst ROK Corps
The ROK, a force of 58,000, was organized into two corps and five divisions; from east to west, I Corps controlled the 8th Infantry Division and Capital Divisions, while II Corps controlled the 1st Infantry Division and 6th Infantry Division.
I Corps (South Korea) was created July 24, 1950, just before the Battle of Pusan Perimeter.

1st Cavalry Division (United States)

1st Cavalry Division1st Cavalry Division (Airmobile)1st Air Cavalry Division
Under it were three weak US divisions; the 24th Infantry Division was brought to the country early in July, while the 1st Cavalry Division and 25th Infantry Division arrived between July 14 and 18.
In the summer of 1950, North Korea attacked South Korea, and the 1st Cavalry Division was rushed to Korea to help shore up the Pusan Perimeter.

Capital Mechanized Infantry Division

Capital DivisionROK Capital DivisionTiger Division
The ROK, a force of 58,000, was organized into two corps and five divisions; from east to west, I Corps controlled the 8th Infantry Division and Capital Divisions, while II Corps controlled the 1st Infantry Division and 6th Infantry Division.
It later participated in the Battle of Pusan Perimeter.

Battle of the Notch

Ned MooreNotch
US units were subsequently able to defeat and push back the KPA on the flank in the Battle of the Notch on August 2.
Reeling from the Hadong Ambush and being driven from the city of Chinju, the United States Army's 19th Infantry Regiment, 24th Infantry Division scrambled to protect the pass into Masan, the final South Korean city before the Naktong River, where the UN was holding its Pusan Perimeter in place.

Eighth United States Army

Eighth ArmyU.S. Eighth Army8th Army
However, US forces in the Far East had been steadily decreasing since the end of World War II, five years earlier, and at the time the closest forces were the 24th Infantry Division of the Eighth United States Army, which was headquartered in Japan.
The North Koreans threw themselves against that front, the Pusan Perimeter, and failed to break it.

1st Infantry Division (South Korea)

1st Infantry Division1st Division1st
The ROK, a force of 58,000, was organized into two corps and five divisions; from east to west, I Corps controlled the 8th Infantry Division and Capital Divisions, while II Corps controlled the 1st Infantry Division and 6th Infantry Division.
It subsequently fought in the Battle of Pusan Perimeter.

II Corps (South Korea)

II CorpsROK II CorpsII
The ROK, a force of 58,000, was organized into two corps and five divisions; from east to west, I Corps controlled the 8th Infantry Division and Capital Divisions, while II Corps controlled the 1st Infantry Division and 6th Infantry Division.
II Corps was created July 24, 1950, just before the Battle of Pusan Perimeter and it consisted of the 1st Division and 6th Infantry Division.

24th Infantry Division (United States)

24th Infantry Division24th Infantry Division (Mechanized)24th Division
However, US forces in the Far East had been steadily decreasing since the end of World War II, five years earlier, and at the time the closest forces were the 24th Infantry Division of the Eighth United States Army, which was headquartered in Japan.
By 4 August, a perimeter was established around Pusan on the hills to the north of the city and the Naktong River to the west.

8th Infantry Division (South Korea)

8th Infantry Division8th Division8th
The ROK, a force of 58,000, was organized into two corps and five divisions; from east to west, I Corps controlled the 8th Infantry Division and Capital Divisions, while II Corps controlled the 1st Infantry Division and 6th Infantry Division.
Fought in the Battle of Pusan Perimeter.

Nakdong River

Naktong RiverNakdongNaktong
The UN troops, consisting mostly of forces from the Republic of Korea Army (ROK), United States, and United Kingdom mounted a last stand around the perimeter, fighting off repeated KPA attacks for six weeks as they were engaged around the cities of Daegu, Masan, and Pohang and the Nakdong River.
The southern length of the river formed the western portion of the Pusan Perimeter, which the UN forces fought to maintain during the autumn of 1950.

1st Provisional Marine Brigade

1st Marine BrigadeProvisional Marine Brigade1st Brigade
The 2nd Infantry Division, 5th Regimental Combat Team, 1st Provisional Marine Brigade, and British 27th Commonwealth Brigade arrived in Pusan later in the fighting, along with large numbers of fresh troops and equipment, including over 500 tanks.
The brigade participated in a counterattack at Masan before reinforcing United States Army units during the Battle of Pusan Perimeter, and at the First and Second Battles of Naktong Bulge along the Naktong River.

6th Infantry Division (South Korea)

6th Infantry Division6th Division6th
The ROK, a force of 58,000, was organized into two corps and five divisions; from east to west, I Corps controlled the 8th Infantry Division and Capital Divisions, while II Corps controlled the 1st Infantry Division and 6th Infantry Division.
Fought in the Battle of Pusan Perimeter.

3rd Infantry Division (South Korea)

3rd Infantry Division3rd Division3rd
A reconstituted ROK 3rd Infantry Division was placed under direct ROK control.
It also fought in the Battle of Pusan Perimeter.

Incheon

Incheon, South KoreaInchonJinsen
Ports in Wonsan and Hungnam could be used for the transport of some troops and supplies, but they remained far too underdeveloped to support any large-scale logistical movements, and the port of Inchon in the south was difficult to navigate with large numbers of ships.
Eleven days later, Incheon was the site of the Battle of Inchon, when United States troops landed to relieve pressure on the Pusan Perimeter and to launch a United Nations offensive northward.

766th Independent Infantry Regiment (North Korea)

766th Independent Infantry RegimentNK 766th Independent Infantry RegimentNK 766th Infantry Regiment
From south to northeast, the KPA units positioned opposite the UN units were the 83rd Motorized Regiment of the 105th Armored Division and then the 6th, 4th, 3rd, 2nd, 15th, 1st, 13th, 8th, 12th, and 5th Divisions and the 766th Independent Infantry Regiment.
Suffering from a lack of supplies and mounting casualties, the regiment was committed to the Battle of Pusan Perimeter as part of a push to force United Nations (UN) troops out of Korea.

2nd Division (North Korea)

2nd Division2nd2nd Divisions
From south to northeast, the KPA units positioned opposite the UN units were the 83rd Motorized Regiment of the 105th Armored Division and then the 6th, 4th, 3rd, 2nd, 15th, 1st, 13th, 8th, 12th, and 5th Divisions and the 766th Independent Infantry Regiment.
During August and September, the Division fought in the Battle of Pusan Perimeter before heavy losses forced it to be re-organised in November at Kanggye.

First Battle of Naktong Bulge

Naktong BulgeBattle of Naktong BulgeFirst
KPA forces had four possible routes in the perimeter: to the south, the pass through the city of Masan around the confluence of the Nam and Naktong rivers; another southerly route through the Naktong Bulge and into the railroad lines at Miryang; through the route into Taegu in the north; and through Kyongju in the eastern corridor.
It was a part of the Battle of Pusan Perimeter, and was one of several large engagements fought simultaneously.

Gyeongju

Gyeongju CityKyongjuGeumseong
KPA forces had four possible routes in the perimeter: to the south, the pass through the city of Masan around the confluence of the Nam and Naktong rivers; another southerly route through the Naktong Bulge and into the railroad lines at Miryang; through the route into Taegu in the north; and through Kyongju in the eastern corridor.
However, for a brief time in late 1950 portions of the city stood on the front lines, as North Korean forces pushed the Pusan Perimeter southward from Pohang.

1st Division (North Korea)

1st Division1st1st Divisions
From south to northeast, the KPA units positioned opposite the UN units were the 83rd Motorized Regiment of the 105th Armored Division and then the 6th, 4th, 3rd, 2nd, 15th, 1st, 13th, 8th, 12th, and 5th Divisions and the 766th Independent Infantry Regiment.
The division fought in the Battle of Pusan Perimeter.

Bloody Gulch massacre

Bloody Gulchwiping out most of the 555th and 90th Field Artillery Battalionwiping out most of the 555th and 90th Field Artillery Battalions
The surprise attack was successful in wiping out most of the 555th and 90th Field Artillery Battalions, with much of their equipment.
After a very successful attack on two undefended US artillery battalions that killed or injured hundreds of US soldiers, members of North Korea's Korean People's Army (KPA) 13th Regiment murdered seventy-five captured US Army prisoners of war during one of the smaller engagements of the Battle of Pusan Perimeter.