I'm playing the saxon campaign H/H
I've completed the campaign and kept on playing.

And I find it very difficult/impossible to keep my conquered settlements happy.
Although i didn't expanded greatly.
They are still pretty close to my Capital.

It cant be because of the religion, cause all my city's are 99% Paganism.
Also I'm pretty sure There are (allot) no enemy spies, teachers or such.

example:

Capital: Augusta Treverorum

problem city: Avaricum pop:27000 growth: 2%

army: 10 stacks of peasants
6 stacks of trained soldiers.

All the buildings that produce happiness are constructed.

Yet I won’t be able to keep this city from revolting.

And it's happening with allot of other city's as well.
I cant afford to keep all this city's filled with soldiers.

Any suggestions?