In the setup instructions:
-4 PAVN units set up in 1921 not adjacent to anyone.
-All PAVN hexes get an Assault or Maneuver marker
-Game starts in combat resolution.
Not sure how/why the units in 1921 can have a combat marker. Also, in it's present location the HQ can't help coordinate 2124.
Should the units in 1921 start in 1922 instead?
No, only the units adjacent to the FWA forces need to be marked.