Sending reinforcements to another castle helps you protect that castle from enemies' attacks, but you don't take over that castle. What do you mean by defensive units that have been placed in your castle after a raid? 

If another lord under the newbie protection attacks you, he loses his protection towards you and you can attack him back. 

When u send an offensive raid and then send reinforcement raid seconds behind it. I was wondering the mechanics behind this also..

j.clauss.3rd said:

When u send an offensive raid and then send reinforcement raid seconds behind it. I was wondering the mechanics behind this also..

I don't know why do you want to do so.

Well, mechanics will be as always - reinforcements will defend castle. It doesn't matter, offencive one or defencive. Offencive will die faster.

The castle you attacked won't get status, for example, "total enemy" (black list, silent, no comunication at all). So it's just an ordinary mechanic of reinforcements - you can send them to any castle - they will just sit there in deff and not deserted of food miss.

By the way, I wonder, can I kill my offencive army by my deff army in another castle?

THEPHILOSOPHER - but you always can send reinforcements back from your keep.

I am not seeing any info regarding the liberate function. I am discussing the liberation mechanics with players. but we aren't finding info in the game guide or forums search. to liberate i thought tutorial said send defense. when clicking " liberate " it says reinforcements. I guessed def should be sent. another says offense. 

My Lord, liberation is offensive action, that is why you should liberate a Castle with Offensive Troops.