I just finished working up the start of the war strengths & locations for both the RoK and DPRK. There's a TON of units - 58 divisions, 60 bridgades/regiments and 47 artillery brigades/regiments for the North, 50 Divisions, 66 brigades/regiments for the RoK. 8th Army, by contrast, looks tiny with 8 divisions and a few independent brigades! The Soviet Yalu Front features the Bulgarian 11th Tank Brigade, the Soviet 21st GTD, 6 MRDs and the 83rd Air Assault Brigade, under the command of the 30th and 35th Armies.
So most of the forces will be Korean, and it's going to be ugly!
I just re-read
Red Phoenix for inspiration and am thinking of breaking out
38 North Yankee to get a more realistic infantry-level view of the ugliness.
By late 2000-early 2001 I think things in Korea have pretty much ground to a halt and the Korean people are tired of having Yankee troops occupying their land. In the
thread on the recovery plan I detail the evacuation of 8th Army to CENTCOM.
(edit kato13 : added link to recovery thread)