taken from Native Expanded feature list (which im playing until next bas is released)
* Spear Wall ability has been added. When on foot and with a spear type weapon equipped hit b to brace the weapon on the ground. Any cavalry charge against a braced spear will suffer horrible damage usually resulting in the death of the horse. While braced you cannot move, attack, or defend, doing so will release the brace. Troops that are also on foot and armed with a similar weapon will also periodically move into a spear wall stance if they have been given the Hold Position or Stand Your Ground orders. Damage from the spearwall is based on the speed of the horse. If the horse is going slow enough it will take no damage at all.
* In field battles you can whistle for your horse. If you dismount and run around killing people hitting the 'm' key will cause your horse to come to you. Of course, if your horse is dead or you never had one to begin with then nothing will happen.
* When defeated, the player will be given a chance to make an escape based on their pathfinding skill
these might be very good additions with some tweaks eg
1)there might be a chance of the spear "breaking" (automatically dropped and unable to be picked up) if the horse is heavily armored or coming at full speed, this might will require all spermen to have a backup weapon
2)this should work only if "your" horse is not very far and there aren't enemies close
3)this should depend also from the lord army size and prisoners, guarding 10 prisoners with 1000 soldiers is diferent from guarding 1000 with 100 troops