The Guns of Navarone is a World War II adventure film. A team of commandoes led by Captain Keith Mallory (Gregory Peck) sneak onto a German-occupied Greek island where they have to travel across the whole island and disable twin massive artillery guns before a British task force attempts to run the gauntlet in five days.

Drama abounds within the group. Team leader Major Roy Franklin (Anthony Quayle) is injured right off the start becoming a bit of a deadweight on the team causing Mallory and Franklin's friend Corporal John Anthony Miller (David Niven) to clash. Greek Colonel Andrea Stavros (Anthony Quinn) is a friend of Mallory's but has sworn to kill him because he blames Mallory for his family's deaths at the hands of the Germans. One of the team members turns out to be a bit of a pacifist, fed up with all the killing. Two of the local resistance joins the team and shortly thereafter the Germans capture them all so is there a traitor?

I saw this movie when I was a teen and not since. I enjoyed this viewing and having read GURPS WWII not knowing how I'd run it this movie is a great inspiration for a commando adventure that can be a multi-session campaign on its own.