How Brad Pitt Taught His Son About War - And Made 'Fury' a No. 1 Movie

This weekend, Brad Pitt's Furyis not just the box office number one movie making $23.5 million. The film about the World War II tank crew's last offensive against the waning Nazi forces in 1945 was also a teachable moment for Pitt's son Maddox. 

In an interview with the Associated Press, the actor talked about his eldest son's reaction to watching the film.

"He's a bit of a World War II buff so it's interesting for him, I think, but it's still dad so it's not that cool."

It was important to Pitt to explain the reality of war to his kid. "The younger generation play a lot of video games and I want them to understand that there is casualty, you don't just reboot. There are real consequences and real stakes so we talked a lot about that."

WATCH: Brad Pitt Is a Badass In 'Fury'

Fury dislodged Gone Girl after a few solid weeks at number one. The psychological thriller starring Ben Affleck takes second this weekend at $17.8 million -- which adds up to over $100 million total gross in just three weeks.

NEWS: J. Lo Helps Keep 'Gone Girl' Number One 

While Pitt was working on Fury, his wife Angelina Jolie was also working on a World War II film, Unbroken, out in December.

Pitt told the AP that they were learning together. "I was studying the European theatre, she was studying Pacific theatre. I was studying tanks, she was studying bombers. and yeah It was good fun for us."

To see more what Brad Pitt has to say on fatherhood, watch the video below.