I just had an idea with the Prussian Army getting lured to Als, followed by the danish navy evacuating the army (and any civilians that they can get their hands on) and blockading the island so they'd have a hard time getting back where they're useful ... is that plausible in any shape or form?
Well yes and no .Yes in that the Prussians would be unable to do much while blockaded .And no in that the Austrian navy would need to be defeated before a blockade would be an option .And also while on blockade duty the navy could not do much else in other ares were it might be needed .