Clarification on RTA units

[Borodino]

I'm still a pretty inexperienced player, as is my opponent and we have been playing together learning the ropes for about 5 or 6 months and have started our 2nd game. In this game we are using the standard house rules regarding PP purchase of restricted units.

In January 42 as the Japanese player I launched my invasion of Burma. As part of the invasion I used the RTA forces. I planned on using them south of River Salween, as was pretty historical (although they didn't arrive until May) last turn to my shock I realized they were (R) to the RTA Army HQ and I was unable to change that. I immediately informed my opponent when I realized my oversight, but on further inspection I have noticed that the RTA HQ is attached to the Southern Army, so am I interpreting correctly that the RTA units are in fact part of the Southern Army and are just restricted to being under the command of the RTA HQ? Or have I misinterpreted that? Just seeking clarification.

[Smeulders]

For the game engine they are restricted, you won't be able to move them by ship or air transport them to a non-Thai base. That their chain of command ends in a non-restricted HQ doesn't change the fact. However, what you are talking about his house rules. Using them in Burma would technically be against the standard house rule, but nothing stops you from changing it slightly to allow Thai units in limited parts of Burma if your opponent agrees to it. I'm playing with such a HR myself (Thai units are allowed in Burma as garrisons).

[Borodino]

Thank you for the clarification, it makes much sense.