Cavalry vs Square

+6 Victory!  Lose 1 casualty. Infantry is ridden down
5 or worse Retire 1 casualty. Square stands and loses 1 casualty

Afterwards

Winning supports Stand or if a melee result then close to melee if the target can be reached. If a Victory! then continue to support lead unit or stand
Losing supports Retire if lead unit retires / retreats / routed, otherwise stand
Risk to general If general attached and charge lost with retire or retreat result then roll on Risk to General table