Hey Aretaku-
First of all, I don’t play with NAs so I can’t be specific, but I’ll give a couple of overall tips that might ( I emphasize MIGHT) be of help.
#1 The most fun you’ll have is by trial and error. There is no perfect strategy. Personally, my philosophies have come from when I screwed up, and lost games because of bonehead decisions.
#2 Never buy pieces because you think it would be nice to have them. I’ve seen alot of people do that. “Battleships… hmmm… 4 attack, 4 defense, 2 hits to kill… I’ll buy one per round!” Bad idea. Every piece you buy should have a purpose. A Battleship is the same as 8 infantry, and it’s hard to imagine a time in the game when you wouldn’t want 8 more Infantry on the board.
#3 There is no such thing (most of the time) as a bad Infantry purchase. Even though their numbers on attack and defense aren’t very potent, and they’re not too exciting, they’re cheap and protect your costlier offensive pieces. Try not to get to a point where you’re using artillery and armor as fodder. That means you have to purchase wisely, with EVERY country. Example- 27 IPCs for Russia, typically for me would be 6 Infantry, 1 Artillery, and 1 Armor. If you’re purchasing like that, and your opponents aren’t, you’ll eventually see their Infantry dry up, and while you’re losing Infantry (at 3 IPCs), they’re losing Arty or Armor (4 and 5 IPCs). Since it’s an economic game, you’ll win over the long term.
#4 Familiarize yourself with the strafe attack. You attack for one or two rounds, and retreat. The idea is to knock your opponent down so that they won’t be able to counterattack you on their next turn. If you do it well, you could eat into someone’s Artillery, Armor, or better stuff, without exposing your forces to destruction after the fight. It’s also a sneaky way to enhance movement. For example- you’ve got 4 American Infantry & 2 American Armor in Transjordan, and 2 Infantry & 2 Fighters in the Caucasus. There are 6 Japanese infantry in Persia. The Japanese have a large force in India. Instead of bringing all of the forces into Persia and killing the Japanese (therefore leaving your forces exposed to certain destruction), you can attack for one round- killing 3 Japanese Infantry, and losing 2 (by the odds). You then retreat everything back to the Caucasus. You’ve just reduced the Japanese garrison in Persia, and inflicted more damage than you took, while also strategically placing more of your forces in the Caucasus (assuming you needed them there).
#5 Do everything in your power to make your opponent react to you. Gaining the initiative is a HUGE part of this game. Try to dictate the terms. I know that’s a sweeping statement but as you get better at logistics, and understand the ebb and flow of the game more you’ll see what I mean.
#6 To figure out battles, and how they’ll potentially go, add up all the pips on offense and divide by six. You’ll get an approximate number of hits. Do the same on defense. If you don’t figure out the odds before you fight a battle it’s like going in blind. You can’t control the actual roll of the dice but you can control staying out of a battle that by the odds you should lose.
I hope some of this stuff helps, and good luck to you.