84. To Quoc AVUN 1968
Fear of Northern reprisal: Place 1 ARVN Troop and 1 Police in
each South Vietnam space with NVA.
Thoroughly penetrated: ARVN remove 1 in 3 cubes (round down)
No. When you are taking advantage of an Event, you only need place as much as you want and if you want to short yourself so to speak, you can.
EDIT: Well, there is this from 5.1.3:
An executed Event’s text that can be implemented must be. If not all of its text can be carried out, implement that which can.
We know that pulling units from other parts of the board is always an option (1.4.1, 2nd bullet), the question is does the text of the card force removal from elsewhere.
I'm not sure.