ORIGINAL: wegman58
I'm playing the AI - trying to learn something about the game. For the 1st time I'm trying to defend Rangoon. I'm learning this is VERY good for destroying Japanese aircraft if you move the Flying Tigers there (I have lots of double ace Brits too). BUT there are no shortage of Burmese infantry. Are there really no replacements after April 1942? Or am I reading something wrong?
Are you speaking of ground units attached to the 'Burma Corps' specifically? Potential reinforcements will still arrive, but they will be part of various Indian Corps, the Eastern Army, and Australian Corps. I say potential reinforcements because these will often show up in other areas (such as Aden, India, etc.) and you'll have to at the very least transport them to Burma. Some of these units may require you to spend PP to reassign the unit(s) to unrestricted commands or to more appropriate commands to take advantage of HQ bonuses.
Organizing and bringing in a few Australian Divisions can be a big boost. Same goes for the Indian Divisions. It helps to look at the Ground Unit menu (G key) and filter by country and for infantry units only. Then browse through the units and look in the lower-left corner of the unit details menu for units which have 'Unit Organization of [insert unit name here]'
Clicking on the arrow icon will bring up this menu:
To form a division, you'll need to bring all the subunits to the same location, make sure they are all in the same mode (combat, move, strategic, etc.), and make sure they all share the same HQ. Keep in mind that forming divisions can be very expensive in PP if you need to reassign subunits to unrestricted/different commands, so plan ahead before you commit to any changes. The 'Unit Organization' menu will mark which subunits have differences from the others (thus preventing combination).
Divisions are more than the sum of their parts, literally and figuratively. They often enjoy enhanced TOEs over the sum of the subunits which create them and there is a 'synergy' about them, for lack of a better term. Basically, they are a self-contained expression of combined arms and can be supplemented by auxiliary units but are pretty effective even on their own.
I found it useful to take stock of what divisions were potentially available (Australian, British, Indian, etc.) and then note which ones would be 'easiest' to form (i.e. subunits closest together and the most homogeneous HQ assignments), also noting which subunits were most needed where they currently were. Wherever possible, I would gather up the various subunits and form the division. Oftentimes the division will be under strength (measured in % of TOE), so you'll need to consider whether it's better to send it to the front immediately or if you can afford to allow the division to build up first in rest mode (it's also ideal to build up units behind the front lines where supplies are more plentiful). Also note that Divisions build up strength more quickly if you subdivide them into their A/B/C subunits after forming them (and staying in rest mode, of course).
You are correct that Rangoon is very useful to the Allies. Try to hold onto it if you can. I did so in my current GC against the AI basically by stocking it with any ground units I could spare, even before I had the 'luxury' of forming divisions. The biggest advantage of Rangoon is that it can be resupplied and reinforced from the sea and has the potential to develop into a very large port. You'll need this feature of Rangoon because the Japanese will very likely make a big push for it. Expect multiple-division strength forces to be committed and a prolonged battle for the city. You may need to temporarily sacrifice other parts of Burma to hold it. Air superiority will critical to keep the sea lanes of supply open. Beware of the IJN showing up as well to intercept convoys.