War Horse is like Forrest Gump
- he runs fast,
- he’s in a war,
- he gets into unlikely adventures;
and The Black Stallion, assuming that The Black Stallion was actually brown and took place during World War I.
Of course that would mean that the boy in the story would be Jenny, except instead of contracting HIV, Jenny is nearly blinded by Mustard Gas and instead of dying, the two literally ride away from the sunset at the end. I guess the metaphor kind of breaks down a bit …
The sunset, however, could make it a western … but that may be a little off-topic.