I'll send one group from Prussia-Poland, and one group from Bayerland.
Also; warships, in the former case a WW2-era cruiser and in the latter case a modern frigate. Yes or no?
And then there has been and is the option of simply making foreign ships pay for passing one's coastal waters without border controls. Ka-ching! (A sound Wiedheimers haven't heard for 25 years now.)
There is a reason why Wiedheim, like most Lillorainian and Shamsiyyan larger cities, has an extended metro system other than getting people from one place to another. ^^