Various General Tips
Use terrain to your advantage. Mountains, for example, provide a great cover and give your units protection bonus.
When your units enter friendly factories, they stop producing new units, so use it only if it's absolutely necessary.
A good defense is always better than any offense in Warbits. Instead of charging the opponent, focus on fortifying your position and waiting.
You can use infantry to scout the area quickly and with minimal losses. You'll want to get acquainted with your surrounding.
A diverse army is always better than having a number of units of the same type.
Try to memorize the reach of every opponent's unit. That way you can plan things out and make sure your troops are safe.