The Reich is invading Europe! As a commanding officer, it is your job to stop them from reaching their goals. They have tanks and planes, you must stop them with defensive turrets that you have to command and lay in strategic places or all hope is gone.
Protect your kingdom from the invaders. Place strategically your defensive towers on both sides of the road. Try to eliminate all the enemy warriors before they reach your castle.
Instead of building towers and defending against hordes of monsters, play the opposite as an evil mage that builds his army from the ground up to dominate the lands.