UN Forces September 1950 counteroffensive
1950 battle of the Korean War

The UN Forces September 1950 counteroffensive was a large-scale offensive by United Nations Command (UN) forces against North Korean forces commencing on 23 September 1950.
Following the UN counterattack at Inchon on 15 September, on 16 September UN forces within the Pusan Perimeter broke out of the perimeter, driving back the North Koreans and moved north linking up with the UN forces coming from Inchon near Osan on 27 September.
Background
By 23 September the Korean People's Army (KPA) was everywhere in retreat from the Pusan Perimeter. US Eighth Army, motorized and led by armored spearheads, was ready to sweep forward along the main axes of advance. On 22 September Eighth Army commander General Walton Walker issued his order for the pursuit. The Eighth Army order stated: Enemy resistance has deteriorated along the Eighth Army front permitting the assumption of a general offensive from present positions. In view of this situation it is mandatory that all efforts be directed toward the destruction of the enemy by effecting deep penetrations, fully exploiting enemy weaknesses, and through the conduct of enveloping or encircling maneuver get astride enemy lines of withdrawal to cut his attempted retreat and destroy him.
The order directed a full-scale offensive: US I Corps was to continue to make the main effort along the Taegu-Kumch'on-Taejon-Suwon axis and to effect a linkup with X Corps coming from Inchon; the US 2nd Infantry Division was to launch an unlimited objective attack along the Hyopch'on-Koch'ang-Anui-Chonju-Kanggyong (36.153°N 127.01°E / 36.153; 127.01) axis; the 25th Infantry Division on the army's southern flank was to seize Chinju and be ready to attack west or northwest on army order; and the Republic of Korea Army (ROK) in the east was to destroy the KPA in its zone by deep penetrations and enveloping maneuvers. An important section of the Eighth Army order and a key to the contemplated operation stated, "Commanders will advance where necessary without regard to lateral security." Later in the day, Eighth Army issued radio orders making IX Corps, under General John B. Coulter, operational at 14:00, 23 September and attaching the US 2nd and 25th Infantry Divisions to it. This order charged IX Corps with the responsibility of carrying out the missions previously assigned to the 2nd and 25th Divisions.
The public source identifies “UN Forces September 1950 counteroffensive” as 1950 battle of the Korean War. This brief keeps that definition visible, then builds a research path around Forces, September and counteroffensive.
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