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Destroying vehicles, pillboxes or artillery:
When you are attempting to destroy vehicles, pillboxes or
artillery, an excellent way to do so is to have a pig with
a flamethrower (Pyrotechnics have them, level 3 heavy weapons soldiers, or they can be used in multiplayer mode). Walk it up close to the intended target. Face the target, and let rip with the flamethrower, so all the flames hit the vehicle, pillbox or artillery. It should suffer about 102 to 108 points of damage.
Attack with jetpack:
If you have jetpacks that you do not need, walk up to an
enemy and turn around so you are facing directly away from
your target. Equip a jetpack, and aim directly upwards.
Fire the jetpack, and then release it after about two seconds.
The enemy will suffer a maximum of 20 points of damage from the blast caused by the jetpack hitting the earth, plus any additional damage caused according to where the pig lands. Your pig should land safely by parachute, but try and make him land on an enemy. If you can do so, you will inflict 1 point of damage.
You can repeat this as many times as needed one turn, providing you have enough jetpacks and do not suffer damage yourself using a jetpack does not end a turn.