Having read various topics saying something like: I execute all prisoners, except...blah, for ransom, i came up with the idea of writing this post.

What is acceptable from your point of view?

Starting a war on an ally is? Executing thousands of prisoners? Never ransom back your captured soldiers?
Marrying princesses to their brothers?Do you launch a frontal attack or wait for the enemy to be weak and then use hit-and-run tactics?


Personally,
As a general rule, i never attack allies, i hardly ever help them, all to be said.

I always release all the rebel prisoners if the province was owned by rebels when i attacked. After that all the rebellions on my lands are rewarded by death for everyone involved.

If an enemy has a good army with no artillery, and i have a good army, i never use arts.

In battles with reappeared factions i never take prisoners.I consider them rebellions in my land.

I always ransom bck troops that stood until the last man, but never ransom runners.

I never set the taxes to very high, except when im the russians and expecting the mongol invasion.

I do use hit and run tactics on poor provinces.But only destroy the troop producing buildings.


Thats all i can think of.Add your never written laws, and maybe someday froggy will compile them in a book of Chivalry in Total war or something...