Re: The guns aren't (just) for firing at other ships
True, but all of these historically German cities are now either either Polish or Russian, after being captured several days later by Poles under General Stanislav Poplavsky or other Soviet forces (Russian, Ukrainian, Belarusian). I don't necesssarily agree with the removal of prewar German culture there, mostly by the Poles.
Additionally a lot of the final push through the Baltics for example by the Armenian general Bagramyan was further inland, so most likely the opposing forces he was facing were a bit more conventional.