Originally Posted by
Point Blank
RC adds any armor worn by the mount to that of the rider. The amount added is less than for an equivalent armor type worn by the rider since the coverage is less uniform and typically lighter (ie not as thick). It's not an ideal mechanism, but the best that we can do. Cavalry are relatively easier than footmen to hit using missiles by about 50% explicitly, and they also have a larger model radius size which appears to have interaction with missile attacks.
Shooting at moving targets is a hard-coded process but does appear to be accounted for.
The '3' in stat_health is used to affect auto-resolution. It weights the combat value of the unit.
Please look at the RC2.0 Guide for info on the upcoming version. Cavalry has been well-balanced.