"...some anachronisms are so oft-repeated on screen that they've become the norm. For instance, the idea that Roman legionnaires wore leather armour is a cliché that originated with the sword-and-sandal epics of the 1950s, and bands of marauding Injuns never "circled the wagons" in the old west. After all, film and TV require some suspension of disbelief. I suppose the thing to remember about anachronisms is that everybody makes mistakes."