Select a unit, on the right side of the command panel there should be a section that shows the unit's abilities, (the pannel behind it, which can be veiwed by pressing the alt key shows the unit's stats, such as attack, hitpionts, etc) at the top of the abilities panel tere should be a tag that says TACTICS on this row it lists the different icons, one for each stance, that is available to that type of unit. For instance:
Trample is for cavelry, cover is for melee infantry, like pikemen, stager is for all infantry, Volley is for all ranged non-artilery units (infantry and Cav) melee is for non-range infantry and cav, bombard and limber are artillery only, and defensive is for all units, except artillery i think.
[This message has been edited by The_Assimilator (edited 10-21-2005 @ 11:55 AM).]