First of all, an explanation of rules for all of you non-Darkfall players. Sieges are not the easiest things to perform. You don't grab a dropdown box in a menu and select "siege enemy" or anything like that. First of all, one side has to declare war on the other, so the other city kinda knows it could be coming. Sieges are then started by placing a "clan shard" down in the enemy's city limits. There are two ways to challenge with a clan shard, either with gold or with collateral, and this siege involved the latter.