'Warfare' is based on the true story of a Navy SEAL team that fought in Iraq. The directors made it for a soldier who doesn't remember how he lost a leg.

Cosmo Jarvis stars in "Warfare," portraying real-life former US Navy SEAL Elliott Miller.

Murray Close / Stewart Cook / A24 via Getty Images

• A24's new movie "Warfare" is based on the memories of a Navy SEAL team's skirmish in Iraq.
• The film, directed by Ray Mendoza and Alex Garland, recreates the operation to harrowing effect.
• Mendoza said he made the film to show it to an injured comrade, who doesn't remember the incident.

Ray Mendoza, a former US Navy SEAL...