Retraining units

[Alpedar]

Lets say i went in battle with 3 spear militias, 3 lower militias and 3 pavic crosbowman (venice).
Everyone suffered some light causalties so i have 9 wounded units. I retrurn to city (with 3 recruitment slots).
If i simly strated retraining, it would took 3 turns (9 units).

But if i merge wounded units, i will get 2 healthy and one almost depleated for each unit type. So i have 3 almost depleated units and can retrain them in one turn.
Maybe its common knowladge, but i didn't found it anywhere and it realy speeds up recovary after battle.

Btw. if i retrain unit, does newcomers starts with zero experience (so exp. will get averaged and fall), or they gain same rank as retrained unit?

[FactionHeir]

Its common knowledge and is widely used, mainly because retrained units are added at the same experience level of the retrained unit.
I.e. retraining a 9 valor unit will result in all new recruits to this unit being 9 valor as well.

[Old Geezer]

Also, I will oftern save a game and then experiment with merging units to get the best experience out of them. I doubt the AI does it as well because if you auto merge everyone you oftern lose a lot of small high level experienced units in the shuffle. Having many gold and silver chevroned units really helps when fighting the Mongols and Timmurids. It's another micromanaging time killer.

[Jason X]

you reload in order to optimise merging and then moan about micromanagement?
lol!