Zulu Player Attacks Wall
In the video below the Zulu player mixes it up by sitting back and letting his AI squad do the fighting then briefly joins in the attack. A player needs caution because if the player dies his squad can be compromised (no leader) until he respawns and rejoins the battle.
Both British and Zulu players command a squad of AI. They can be ordered individually, in smaller squads or as a whole.
The British AI lose effectiveness as they fight either by being wounded or they become tired. The commanding player can withdraw those soldiers to get water or see the doctor.
Tiredness is one of a number of adjustable settings you can make at game startup.
Command AI to Fire Weapons
A British player can command his AI to defend independently (as in the video) or form them into a defensive line, assign a target area and command them to fire on his command (simulates a real world defensive tactic used by the British).
In game footage from Rorkes Drift:
Some stills from the battle: