Is it a condition for fighting that we be under the banner of the ruler?

The questioner : It is necessary that this prince be with the congregation, meaning under his authority and command... Is he committed? Can he? Is this a condition? Is it not the case that this prince does not have to be a ruling sultan or caliph?

The Shaykh : Yes, it is obligatory that it be so, except in one case: if the Muslims are attacked in their own homeland, then this is not a condition in that case.

The questioner: May Allah reward you with good.