Troop reinforcements

Can you move troops between villages then send them out to attack from your second or 3rd villages? or are they fixed to 1 village

I tried that the other day but they can only be used for defence which is gay

you have to send them to attack in the village you trained them in, even if its 8 hrs till attack you have to

is it right that if you send someone renforcements then the attack is cancled?

techincally it is cancelled out but i wouldnt recommend it as your troops are attacking each other