My players would castrate me if they went up to the guards and they where met by incompetence and I would just hand weave oh the guard won’t help you because they are just static images.
I don’t who Tiberius is, but if he was at my table and wanted to call the army and had established strong bands to governing force. But we assume he would not have a valid cause where the governing force would go of course here is army to protect the land.
With good enough persuasion and paying for the cost for the conscription I would let him.
Why would you not do this?
I don’t get why it would not be enough consequences. The party would fight all over the world against different adventure party’s that dying to be heroes. Every time they entering new town they have to hope the inn don’t have two or more adventure party’s.