One thing that has been bothering me about sieges - they're not really sieges. You notice when you fight during a siege (assault or sally) that the beseiger only can deply around half of the city. In addition, depending on the location of the beseiging army in relation to the city on the strat map, it is possible to move units into the city from outside by entering the city from the opposite direction. A siege has to surround the city and cut it off from supplies. Since it seems clear the beseiging army only camps on one side of the city, how can it really be considered a siege, especially for starvation purposes?