Yes... I still like 'em 35 years later...
8.23 Reinforce a Battle (Combat or Breakthrough Phase)
Each Special Action spent allows one unit in good order from an adjacent uncontested area to reinforce a declared combat (Defender only). This reinforcing unit may not violate stacking, may not reinforce a battle involving only assets (4.35), and may not be designated as the point unit unless the original point unit is eliminated.
I know it may sound dumb but since it's not explicitly stated, I thought I would ask : Is the reinforcing unit moved to the battle area?