I love how the soldiers in the opening are like omg and cowering before a group of enemy tanks bout to murder them and one starts yelling (in his off-the-shelf "soldier in a battlefield calling for backup" voice) to "get in touch with w the eight armored division." Not contact, not radio, not call, but "get in touch with". Ask them how's their day. Send a polite request for assistance.

It then cuts to a group of high school kids finding dead soldiers everywhere. They take it upon themselves to save the day on their own. I have no doubt they will succeed.