I can't beat you Belb - 1460 is my best.
I tried by being mean all the time but couldn't do it. So my best strategy was to be nice right up until the last few years. With taking off military rule, allowing elections and giving them all the nice stuff. Then at the end putting on military rule, "no-one gets out of here alive", taking off all the nice edicts, lowering salaries, raising rents etc, and firing anyone who stilled dared be happy. It felt like stamping on a kitten.
Good challenge CK but I won't play this one again - sooo sad!