Need help with military units for my novel . [ OT ]

I can help you out. If you're doing this the way I am seeing it in my head, you're going to need to be thematic here. The Russian, Egyptian, and American forces can all be based on reality, which will take a bit of research, but Heaven and Hell are very much archetypes. You're going to want to pick a thematic way in which to handle them. 
 
 For example: Heaven can go a couple of ways. It can be the reluctant parent, punishing a child: All powerful, but slow and sad to react. 
 
 It can be the righteous fury of those defending all that is good: No bloodshed, but the obliteration of enemies completely. Cleansing fire. 
 
 It can be very human, if you want. The good guys who did not start this war, but will defend what they love to the last man. Bloody, upfront, and personal. 
 
 Hell, on the other hand, can have its own variety. 
 
 The traditional inferno idea is just mindless monsters of evil headed by a few intelligent and cunning dark leaders. 
 
 Instead, you could opt for the `` rebel underground'' idea: Hell is not necessarily evil here, but merely disagrees with the way Heaven runs things, or perhaps are resentful at being kicked from their one-time home and placed into this `` separate but unequal'' land. They are weaker than heaven militarily, but more numerous and more cunning. 
 
 They could be the all consuming darkness: A force that is numberless in its troops and plays the long game of war very strategically with a single-minded leadership and little individuality throughout. 
 
 Or, you could even run with a `` cold war'' style, where Hell is about tempting the enemy into fighting for them, and rarely comes to battle themselves. 
 
 PM me if you want to discuss this further. Can talk specifics after we've developed a theme.
