....well, as long as the turkiye still has their cannon they should held out enough to at least Balt-rhein to fall. They don't seek to conquer the castle, but to destroy them completely after all.
With how many nations hated them along with someone that can claim as blood-relative to Rum's Emperor on Turkiye's side, they're fucked.
Plus, the bridge is in ruin, so I think Balt-rhein sending army outside is still pretty hard.