CG Maj. Gen. Chon U
7th KPA Division This Division was formed in early 1950 from Korean personnel of the 138th, 140th, 141st, and 156th PLA Divisions. It is unclear as to what infantry regiments were originally assigned to the division. The Division was redesignated the 12th KPA Division on or about 4 July 1950 (see 12th KPA Division below).
It appears that a new 7th KPA Division was reformed using the 1st, 2nd, and 3rd Infantry Regiments of the 1st KPA Division as well as troops of the 7th Border Constabulary Brigade. However, late-war order of battle reports list the 7th KPA Division with the 51 st, 53rd, and 54th Infantry Regiments, indicating that the Division may have again been decimated in 1951 and rebuilt.
Regiments 30, 32, 32
July 12, 1950
The N.K. 15th Division, meantime, joined the attack after following the 7th Division from Ch'unch'ŏn to Wŏnju. At Wŏnju, the 15th veered westward, passed through Yŏju, then turned south, clearing the town of Changhowŏn-ni after a stiff battle with ROK forces.
By 12 July, the 15th occupied Koesan, eighteen miles northwest of Mun'gyŏng. See map Wŏnju to Yŏju to Changhowŏn
June 25, 1950 0830
At0830 a ROK officer at the front sent a radio message to the Minister of Defense in Sŏul saying that the North Koreans in the vicinity of the Parallel were delivering a heavy artillery fire and a general attack, that they already had seized the contested points, and that he must have immediate reinforcements-that all ROK units were engaged. [03-27] The strong armored columns made steady gains on both roads, and people in Uijŏngbu, twenty miles north of Sŏul, could hear the artillery fire of the two converging columns before the day ended. At midmorning reports came in to Sŏul that Kimp'o Airfield was under air attack. A short time later, two enemy Russian-built YAK fighter planes appeared over the city and strafed its main street. In the afternoon, enemy planes again appeared over Kimp'o and Sŏul. [03-28]
Eastward across the peninsula, Ch'unch'ŏn, like Kaesŏng, lay almost on the Parallel. Ch'unch'ŏn was an important road center on the Pukhan River and the gateway to the best communication and transport net leading south through the mountains in the central part of Korea. The attacks thus far described had been carried out by elements of the NKPA I Corps.
From Ch'unch'ŏn east ward the NKPA II Corps, with headquarters at Hwach'ŏn north of Ch'unch'ŏn, controlled the attack formations. The NKPA 2nd Division at Hwach'ŏn moved down to the border, replacing a Border Constabulary unit, and the NKPA 7th Division did likewise some miles farther eastward at Inje. The plan of attack was for the 2nd Division to capture Ch'unch'ŏn by the afternoon of the first day; the 7th Division was to drive directly for Hongch'ŏn, some miles below the Parallel. [03-29]
The 7th Regiment of the ROK 6th Division guarded Ch'unch'ŏn, a beautiful town spread out below Peacock Mountain atop which stood a well-known shrine, Nocheon-ri, Sutasa, with red lacquered pillars. An other regiment was disposed eastward guarding the approaches to Hoengsŏng. The third regiment, in reserve, was with division headquarters at Wŏnju, forty-five miles south of the Parallel.
The two assault regiments of the NKPA 2nd Division attacked Ch'unch'ŏn early Sunday morning; the NKPA 6th Regiment advanced along the river road, while the NKPA 4th Regiment climbed over the mountains north of the city. From the outset, the ROK artillery was very effective and the enemy 6th Regiment met fierce resistance. Before the day ended, the NKPA 2nd Division's reserve regiment, the 17th, joined in the attack. [03-30]
Lt. Col. Thomas D. McPhail, adviser to the ROK 6th Division, proceeded to Ch'unch'ŏn from Wŏnju in the morning after he received word that the North Koreans had crossed the Parallel.
June 26, 1950
Lt. Col. Thomas D. McPhail, adviser to the ROK 6th Division, proceeded to Ch'unch'ŏn from Wŏnju in the morning after he received word that the North Koreans had crossed the Parallel. Late in the day the ROK reserve regiment arrived from Wŏnju. A factor of importance in Ch'unch'ŏn's defense was that no passes had been issued to ROK personnel and the positions there were fully manned when the attack came.
The battle for Ch'unch'ŏn was going against the North Koreans. From dug-in concrete pillboxes on the high ridge just north of the town the ROK 6th Division continued to repel the enemy attack. The failure of the N.K. 2nd Division to capture Ch'unch'ŏn the first day, as ordered, caused the N.K. II Corps to change the attack plans of the N.K. 7th Division. This division had started from the Inje area, 30 miles farther east, for Hongch'ŏn, an important town southeast of Ch'unch'ŏn. The II Corps now diverted it to Ch'unch'ŏn, which it reached on the evening of 26 June. There the 7th Division immediately joined its forces with the 2nd Division in the battle for the city.
Apparently there were no enemy tanks in the Ch'unch'ŏn battle until the 7th Division arrived.
June 27, 1950
The battle for Ch'unch'ŏn was going against the North Koreans. From dug-in concrete pillboxes on the high ridge just north of the town the ROK 6th Division continued to repel the enemy attack.
The failure of the N.K. 2nd Division to capture Ch'unch'ŏn the first day, as ordered, caused the N.K. II Corps to change the attack plans of the N.K. 7th Division. This division had started from the Inje area, 30 miles farther east, for Hongch'ŏn, an important town southeast of Ch'unch'ŏn. The II Corps now diverted it to Ch'unch'ŏn, which it reached on the evening of 26 June. There the 7th Division immediately joined its forces with the 2nd Division in the battle for the city. 
Apparently there were no enemy tanks in the Ch'unch'ŏn battle until the 7th Division arrived
The battle continued through the third day, 27 June.
June 28, 1950
The defending ROK 6th Division finally withdrew southward on the 28th on orders after the front had collapsed on both sides of it. The North Koreans then entered Ch'unch'ŏn. Nine T34 tanks apparently led the main body into the town on the morning of 28 June. [03-32]
The enemy 2nd Division suffered heavily in the battle for Ch'unch'ŏn; its casualty rate reportedly was more than 40 percent, the 6th Regiment alone having incurred more than 50 percent casualties. According to prisoners, ROK artillery fire caused most of the losses. ROK counterbattery fire also inflicted heavy losses on enemy artillery and supporting weapons, including destruction of 7 of the division's 16 self-propelled SU-76-mm. guns, 2 45-mm. antitank guns, and several mortars of all types. [03-33] The N.K. 7th Division likewise suffered considerable, but not heavy, casualties in the Ch'unch'ŏn battle. [03-34]
Immediately after the capture of Ch'unch'ŏn the 7th Division pressed on south toward Hongch'ŏn, while the N.K. 2nd Division turned west toward Sŏul.
July 2, 1950
([ the N.K. 7th Division was] redesignated the 12th about 2 July 1950). [02-6]
Eastward, the N.K. 7th Division advanced down the mountainous central corridor of Korea after it had helped the 2nd Division capture Ch'unch'ŏn in the opening days of the invasion. Retiring slowly in front of it and fighting effectively was the ROK 6th Division.
Between Ch'unch'ŏn and Hongch'ŏn, the 6th Division inflicted approximately 400 casualties on the enemy division and knocked out a number of its T34 tanks.
From Hongch'ŏn the battle continued on down the road toward Wŏnju, the action reaching the edge of that rail and road center on or about 2 July.
There, the North Korean High Command relieved Maj. Gen. Chon U, commander of the 7th Division, because his division was behind schedule in its advance.
At the same time, the North Korean high command redesignated the 7th Division the 12th, and activated a new 7th Division.
July 3, 1950
This division [N.K. 7th Division. ] was activated on 3 July 1950; its troops included 2,000 recruits and the 7th Border Constabulary Brigade of 4,000 men. An artillery regiment had joined this division at Kaesŏng near the end of July. [note]
August 17, 1950
As a part of the enemy build-up in the south, another division now arrived there-the 7th Division. This division was activated on 3 July 1950; its troops included 2,000 recruits and the 7th Border Constabulary Brigade of 4,000 men. An artillery regiment had joined this division at Kaesong near the end of July.
In Seoul on 30 July, 2,000 more recruits conscripted from South Korea brought the 7th Division's strength to 10,000. The division departed Seoul on 1 August, the men wading the neck-deep Han River while their vehicles and heavy weapons crossed on the pontoon bridge, except for the division artillery which was left behind.
The 7th Division marched south through Taejon, Ch'ŏnjin, and Namwŏn. The 1st and 3d Regiments arrived at Chinju on or about 15 August.
Two days later some elements of the division [7th Division ] reached T'ongyong at the southern end of the peninsula, twenty-five air miles southwest of Masan.