Looks fashtastic to me!
Liked the use of music, the theme was cool on the preview vid too.
Some of our guys over over on the stormer reckoned it was a slight allegory to the Earnest guy and his delving discoveries. Powerful stuff either way.
The wildlife scenes added to the punch and really gets it going at a cerebral level (or is that a visceral level?)
Those animations you used for the cavalry scenes are brilliant, simple and clean yet very fluid. I've watched a lot of anime but can't fathom how you rotoscoped that to be as smooth as it was! Even Murdoch himself was pretty decent bouncing about on that horse.
I use combat flight simulators for my action scenes usually. It is not easy to fit into a storyline typically though.