When can play US reinforcement cards?

[cgoddard]

It is now 26th Dec - I have loads of US reinforcement cards but am unable to play any of them. Is there a trigger or something that would allow them to be used?

[nikdav]

You can deploy only in the yellow hexes !

[cgoddard]

Worked for some but a number of available divisions have no yellow hexes - mainly ones due to arrive from the South

[nikdav]

There are some units on map with a little orange triangle non available to player (waiting orders from HQ - Still moving in rear area - reorganizing - ........)
You can see the warning moving the pointer over the triangle :

[nikdav]

You can see all the currently unavailable units on the REPS folder:

[cgoddard]

Thank you! Although it only shows British units and not the US stuff mentioned on the cards