Newbish question

[GrudgeBringer]

I have a couple of questions about attacking armies.

I have watched my battles but am not really sure if I saw things clearly.

1. Does Attack (and then say archers, closest, ect) mean that there is no 2 turn wait like Hold and Attack.

2. does Fire and Flee mean the archers are useless for the rest of the battle?

3. If I put my Cavalry behind a another unit anf the other unit is on Hold and attack but the CAV is NOT on hold but rather just Attack rear units, will going thru the troops in front of them cause loss of cohesion or any damaging effects to either group?

Starting to get this part down...(Magic is going to be a struggle)but one thing at a time.

Thanks for helping!!