Haven’t been here and wanted to share some incredibly basic, but oh-so-useful wisdom/info:
You can refill enemy weapons you pick up if you use an enemy ammo box
Grenades are incredibly useful. Use them. But remember, explosion packs aren’t as effective against infantry.
The Type 2a SMG is actually really good for close-quarters and fairly solid for medium-range.
If you knew any of this, great! If not, there you go; the more one knows…
Never try to fight someone who has the high ground in a sword fight.
Three random pieces of wisdom lights the flame 
Some more wisdom.
Place APCs infront of points in hidden areas. Allowing for new angles of attack, especially on defence.
Bots are more than spare lives to be hoarded behind friendly lines as long as you don’t stand out an enemy might kill a bot instead of
Does Gaijin and wisdom even go together?. 
In clan wars, It is better to prepare large squads with more than on engineer. this way, you can command a bot to build the rally, and charge into battle to clash sooner. In public matches, it is usually better to try and get eng+AT gunner +radio in most of your squads, so you have a more versatile arsenal. Clan wars aren;t subject to AP mine and vehicle spam usually.