Powerful force:- Go to the preferences screen and set your side to 250%
on the percentage bars along the right side of the screen. This will make
artillery, armor, and Infantry much more powerful. It will also make them
harder to be destroyed. Set the enemy to 30% and you will be able to
decimate the enemy.
Powerful tank:- If you have the OOB editor, create a tank and put all
armor plates to 255 and the angle to 125. This will make you new tank much
harder to hit, and make it withstand a lot more hits than normal armor.