Warhorses of Letters is a running strand in a comedy night called Tall Tales. People with a lot of time and Google on their hands periodically send me things they have found while looking for one or the other: Disney (one of my more persistent Nemeses, see Stripes, Racing) released a film called Tall Tale in 1995.
Luckily, Tall Tale is not about an evening of comic stories and songs; it's a ropey-sounding Western. it features a legendary cowboy called Pecos Bill, played by Patrick Swayze, and his horse, Widowmaker, a dangerous animal he eventually leaves with the small boy who is the film's hero, which doesn't seem sensible. Still, Widowmaker is a good name for a warhorse.