As the Sweboz it is a good idea to disband all your cavarly at the very first turn in the capital (perhaps keep 1 unit at most); they cost tons of money to maintain and they are going to be useless, since you are unlikely to see a field battle until quite late in game, because you will only fight rebel cities, and cavalry is useless in siege, unless you wait it out. But then again units of foot skirmishers are much more cost effective really even for that role.