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At different times the 9th, 10th, and 17th KPA Divisions
were reported as truck-mounted mechanized divisions. It is not known if they were maintained in this status or if they reverted to foot-mobile infantry at different times.
After the invasion of the south and its initial successes, the KPA was greatly expanded and reorganized. The 105th Armored Brigade was upgraded to a division. The 7th KPA Division was redesignated the 12th, and a new 7th was formed from the 7th Border Constabulary Brigade.
The 9th Mechanized Division was raised from the 3rd Border Constabulary Brigade,
while the new 8th, 10th Mechanized, 17th Mechanized, 24th,
38th, 41st, 43rd, and 47th KPA Divisions were raised and placed under the I-V KPA Corps.
September 1, 1950
On the morning of 1 September the 1st and 2d Regiments of the N.K. 9th Division (the 3d Regiment had been left at Inch'ŏn), in their first offensive of the war, stood only a few miles short of Yongsan after a successful river crossing and penetration of the American line. At that point the chances of the division accomplishing its assigned mission must have looked favorable to its commanding general, Pak Kyo Sam.
By October 1950, the 18th, 19th, 32nd, 36th, 37th, 42nd, 45th, and 46th KPA Divisions were organized and numerous additional support units were raised.
as of January 1951
VI KPA Corps
9th KPA Division (25th, 27th, and 29th Infantry, 9th Artillery Regiments)
17th KPA Mechanized Division (8th, 28th, UII Infantry, UII Artillery Regiments)
18th KPA Division (UII Regiments)
23rd KPA Division (UII Regiments)
At end of war
VII KPA Corps
3rd KPA Guards Division (7th, 8th, 9th Infantry, 3rd Artillery Regiments)
7th KPA Division (51st, 53rd, 54th Infantry, 7th Artillery Regiments)
9th KPA Division (85th, 86th, 87th Infantry, UII Artillery Regiments)
540th Reserve Regiment