The Great Wall Movie

THE GREAT WALL MOVIE (2017)

STORYLINE :

A band of European mercenaries are in China searching for the magic black powder that kills many (gunpowder). After losing all of their men to Khitan bandits in the region, the last two mercs, William (Matt Damon) and Tovar (Pedro Pascal), stumble upon the great wall (unsure how they didn't see it).