Battle for Earth

A voice message is received by the people of the earth which shows up on every screen which could have not been a hacker. It's warning humanity and demanding to give up their independence to "them" and let them take over or else. This freaks out humans but this maybe a sign for war. This makes presidents of each country to start thinking of raising its number of soldiers and increase their arsenal. Only to find out that "they" have already been on earth. Its up to us to save ourselves. Humanity must rise again. We must fight back