Siege combat is conducted ten days at a time. Each ten days, the system determines which side in the siege has the military advantage. This is done by averaging each leaders (of the army and the fiefs bailiff) Leadership, Guile, Management and Stature (plus Skill values). Half the troops in the fief count as defenders. Each keep level is worth 1,000 troops. If the fief is using auto-bailiff , the defenders overall leader value is 5, although it is usually higher with a decent bailiff. Multiply leader advantage by troop values. Divide lower into higher and that is that sides advantage. The side with the advantage gets to add or subtract up 0-10 keep levels (lowered if attacker has advantage, raised for defender). The attacker has three options when a fief is under siege. He can storm the keep (getting a lot of his troops killed if there is a high keep level), attack the fortifications (looses fewer troops and, like a storm, lowers the keep level) or just sit there and wait for his chances of a successful storm or negotiation to improve (which they do, as time goes by.)