Also, (and this could be considered a game mechanic failure) you still get a replenishment turn after a fight you do defensively on the AIs turn. So if you get attacked, at the start of your next turn you will have replenished.

The reason I say it may be bad mechanics is because I think you may get a replensihment turn after your end turn but before you get attacked, so you effectively replenish twice.

On the other hand, though, I noticed that you suffer seige attrition every time you come under siege, and on legendary it is a higher rate. When I am the one sieging, they suffer no atttition if they sally out on their first urn. And when they do get attrition on their second turn, its like 3-5 dudes. I, on the other hand, suffer attrition even if I do sally out my first turn after coming under seige, and its like 8-10 I lose.

I might also point out that unlike previous TWs, purchasing a unit will give you that unit at the end of your turn, so if you get attacked after your end turn, that unit will be trained and join the fight. The AI gets the same perk.