With the Mongolian horse warfare, I did a lot of research into the Mongol art of war.
Twelve years ago, when I was on the Pine Ridge Reservation for 'Thunderheart,' I was dong research into Native American horses that had come into extinction. I was tracing certain Lakota bloodlines, and it became an obsession.
I feel that Marco Polo has really been misrepresented - has never really gotten his due.
In many ways, it's easier to write a book. You have more latitude with structure, and you have the freedom to luxuriate within the internal lives and musings of your characters. But where a screenplay does not always demand great prose, a novel lives or dies by it.
I started looking into horse history books and came across the actual story of this half-breed endurance horseman and his painted mustang Hidalgo. I wasn't really sure if I was going to do the movie at that point.
'Horse thunder' is what I call the sound of galloping hooves.
