Mounted Imperial Columns in Melee:
Do Imperial cavalry/camelry columns suffer the same negative effects
when charging/charged in melee in contact?
Yes. Imperial mounted units in column formation suffer the same
negative effects when charged or charging into melee contact as do
infantry. With the exception of being charged in the flank or rear -
which supercedes the effects of the column - other modifiers still
apply. For example, a cavalry column may still claim the "mounted +1" modifier for the first turn of melee contact.