"An unknown watercraft sparks confusion when Naval officers find it in the middle of the ocean. As Lt. Alex Hopper (Taylor Kitsch) and Petty Officer Cora 'Weps' Raikes (Rihanna) approach the craft, ...

The bulk of War Machine follows Ritchson’s character (known only as “81”) and a squadron of would-be Army Rangers on a training mission that goes sideways when they encounter a deadly alien ship.