Occupying reinforcement hexes?

[Currahee]

I think what tactics are gamey depends on the scenario; it's not a huge problem in TOAW, but some scenarios are more susceptible than others; usually the designer will address this in the scenario briefing, as "honor rules".

All HQ's affect supply the same way; the key is the support level...internal, army, force, free. Div HQ's often are set on internal support, but they don't have to be; the system gives a lot of flexibility to the designer. Internal support, the HQ supports only units in the HQ's formation; army support, same two-tone color scheme; force support, same background color scheme; free, supports any friendly unit. It's a bit more complicated than that; any HQ can support a "cooperative" unit; for example, if a division formation is set on internal, the HQ can support all the units in that formation; but if there is a friendly unit not in that formation, but of the same background color, and it is set on force support, then the Div HQ can support it. Basically, you check both units, and the highest achieved cooperative level is the one that counts.

For the supply bonus to apply, the HQ must be adjacent. Arty support is different, it can support up to the maximum range. Special supply units have their own effective radius. But to get the HQ bonus, you need to be adjacent.

In most cases, the designer will set higher level HQ's on free or force support, sometimes army support, so they are more useful. It's a bit silly to have a corps formation containing a bunch of support units, and then set the HQ on internal support; you have basically limited it to supporting corps support units, rather than the divisions, brigades etc which are the corps commander's main concern.