"Ah, now that is something more understandable" Aubrae nods. "Yes, a concrete example would be a good thing, I think."
She leans back, lifting a delicate hand to her face to hide a small cough as she clears her throat. Then she continues.
"In your example, if Roesone was invaded by forces aligned with the shadow - in effect, if Roesone was subject to a Shadow Incursion - you would, naturally, besiege others for aid.
The first thing you would do, would be to send out dispatches. To your closest allies, and to the centralized administration. From the moment you do that, however, you should not be forced to continue spending valuable time by constantly besieging people to help you, when that time could be better spend amongst your people, keeping their spirits up and leading the defenses.
Your closest allies would, I presume, rush to your aid. And being your allies, they would have no trouble crossing your borders. Others who might wish to aid, however, might run into a series of troubles. Avanil, for example, might have to send troops through Diemed to reach Roesone - and to do that, we need permission from the Archduke. Tuornen, Endier and Alamie, might likewise wish to rush to your side, but might be prevented entry through neighbouring countries and left to flounder on their borders.
That is where the centralized administration steps in. When word for help reaches the administration, they, not you, will send out dispatches to other realms, and secure the passage needed under the auspices of the treaty. They would contact the CoT, look into what manner of aid can be brought to you and how, and keep you appraised all the while of what help will arrive, and, hopefully, give an approximate timescale for it to arrive in - leaving Roesonean leadership with more time and resources to properly take on the threat to their lands, rather than force you to spend half your time directing defenses, and the other half sending and waiting on messages that might first have to go through enemy lines and."
She stops and tilts her head slightly.
"Does this answer you question satisfyingly, Your Excellency?"