WWII Defense is a challenging tower defense game set in the World War II. It features three unique campaigns where you fight from Poland to Russia through progressively challenging levels. In a battle you place multiple units in strategic posts to stop waves of enemy forces, on the ground and in the air, from invasion. And you can also use couples of power-up items like fences, grenades and mine fields to facilitate the defense.
In the gameplay trailer above you can view in-game footage from iPad that walks you through the tutorial inclusive all basics. Following the first battle, there is also part of the real battle where you need to withstand 6 waves of invasion while using the cheapest and weakest soldier units.