It's actually a disaster story, not a battle story, which is something I'm surprised Patrissimo missed in the opening paragraph.*

*(Possibly because disaster movie protagonists tend to be older, so it wouldn't fit that bit quite as well)

Your "enemies" are those too shortsighted to realise the true dangers, and your aim is to reveal the dangers to them, and save the world.

But as others have stated, with sufficient attention any story can be mapped to a combination of tropes (inverted, subverted and played straight).