rise up

verb

1. To ascend to the surface.
2. To mount a rebellion or insurgency; to rebel; to revolt.

   “Captain Anderson: Shepard's right. We're headed for war with the Reapers. If we lose, it's the end of all life as we know it. And no other species in the galaxy truly understands what it will take to survive. Captain Anderson: The other races have to follow our lead. We need to take control. It's time for humanity to rise up and seize its destiny!”

3. Of a horse, etc., to rear.