The Man on this Horse

I do not know the man on the horse in this statue picture. However, I do know that he died in battle.

How would I know that when I do not even know who the man was?

If a statue in the park of a person on a horse has both front legs in the air, the person died in battle; if the horse has one front leg in the air, the person died as a result of wounds received in battle; if the horse has all four legs on the ground, the person died of natural causes.