According to Variety:

“Anthony Michael Hall will star alongside Brad Pitt in “War Machine,” Netflix’s satirical comedy about the U.S.’ engagement in the conflict in Afghanistan, slated to be released in 2016.

Hall, whose credits include “Foxcatcher,” “The Dark Knight” and “The Breakfast Club,” will play the second-in-command to Pitt’s four-star general, who’s based on the real-life Gen. Stanley McChrystal. Cast also includes Topher Grace (“That ’70s Show”), who will play a civilian media adviser.

“War Machine” is written and directed by David Michôd (“Animal Kingdom”) and based on Michael Hastings’ book “The Operators: The Wild and Terrifying Inside Story of America’s War in Afghanistan.” Film is to be produced by Pitt and his Plan B partners Dede Gardner and Jeremy Kleiner, along with Ian Bryce (“World War Z”).

Netflix has said the original film will be available in theaters and to streaming subscribers in 2016 — although large theater chains have been vocal about their plans to boycott the company’s releases, given Netflix’s short or nonexistent theatrical windows.”

Thanks to Deadline we find out the character name:

“EXCLUSIVE: Brad Pitt found his military sidekick in his new Netflix feature War Machine. Anthony Michael Hall has been cast to star opposite Pitt in the satirical comedy from writer-director David Michôd (The Rover, Animal Kingdom). The project, which was inspired by the bestselling book The Operators: The Wild And Terrifying Inside Story Of America’s War In Afghanistan by the late journalist Michael Hastings, concerns a four star, “rock star” general whose lethal reputation and impeccable track record vaults him to command the American war in Afghanistan. While Pitt plays a character loosely based on Gen. Stanley McChrystal, Hall portrays the No. 2 in the military regime — Gen. Hank Pulver, who is also loosely based on McChrystal’s second in command Gen. Mike Flynn.””

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