Call of Duty: US and British military go head to head
Military teams from the United States and Britain have gone head to head for the first time in a transatlantic gaming competition.
The Call of Duty Endowment Bowl took place on Friday, to raise money for veterans' charities.
Gaming, or e-sports, is already a multi-billion dollar industry attracting huge audiences.
It's also increasingly being used by the military to engage younger audiences.