The International Fleet wants you to join Battle School.

Harrison Ford is at the center of a new viral video for Ender's Game, pegged to the movie's appearance this week at Comic-Con International in San Diego. The video features Ford as Colonel Hyrum Graff, speaking directly into the camera and addressing new Battle School students. His somber speech recounts the history of mankind's war against the Formics, as footage of an aerial battle plays on.

"When we were first invaded, we were not ready. Millions of innocent lives were lost. That must never be allowed to happen again," says Graff. "We threw everything that we had at the invaders, and in the midst of that decisive battle, a legendary hero emerged. Let the courage of Mazer Rackham be your inspiration. We will never forget what the enemy did. But we defeated them. And we will do so again."

In addition to the new clip, a series of new Ender's Game posters are now online courtesy of Moviefone and Fandango. The aforementioned Mazer Rackham, played by Ben Kingsley, is below.

Directed by Gavin Hood, Ender's Game also stars Asa Butterfield as Ender Wiggin, Abigail Breslin as Valentine Wiggin, Hailee Steinfeld as Petra Arkanian and Viola Davis as Major Gwen Anderson. It opens Nov. 1.