Korea OPLAN late 1980's (Prior to 1988 & No NATO Contigencies)
 

IX Corps
2 ID
7 ID (L)
25 ID (L)

III MEF
3 Marine D
- 1 MEB
- 9 MEB
- 9 RCT

I Corps
9 ID (Mtz)
40 ID (M)
29 IB
41 IB
81 IB (M)
116 ACR

Is this a T2K OPLAN or a RL OPLAN? Because if it is supposed to be a RL OPLAN, it's very wrong. Unfortunately, due to security considerations, I cannot correct you for a RL OPLAN.

Paul,
I gleaned it from this.... https://history.army.mil/html/books/...H%2040-1-1.pdf
The second major non-European contingency plan requiring a corps- level Army commitment augmented the forward-deployed 2d Infantry Division in Korea in the event of localized hostilities there. This plan called for the 25th Infantry Division, the 7th Infantry Division, the 9th Infantry Division (Motorized), an Army National Guard mechanized infantry division, and four Army National Guard independent infantry brigades to fight in Korea.8 Even without simultaneous operations in all theaters, Army commitments exceeded available forces.9

I pulled the Marines from other sources and I could only find three ARNG Inf Bdes that I could confirm Korea OPLAN contingencies, I rolled the dice on 116 ACR because I found one source stating that.

Paul, it’s been 30 plus years now, surely We can get something, at least units which had Korean contingencies ?

No one in an official capacity has told me that anything I learned of a classified nature has been declassified. Until then...