Started a Prussia GC and on the first turn I decided among other things to start slowly improving my defensive capabilites. Started from Hamburg where I ordered 1 unit of coastal artillery and was about to order 1 unit of fortress artillery, but noticed that I lack industry there to produce fortress artillery (which is IMO weird because one would think casting a bigger barrel is always more complex, but whatever). Good thing is I don't lack industry in other parts of the country so I figured I'd produce there, move them to destination and assemble the pieces at Hamburg fortress, but apparently I failed at doing that also. I admit I've read the manual and stuff and I clearly remember that garrison units can be moved only when under attack so it wasn't exactly uber surprising, but how prudent is that I can't actually produce parts, then transport these parts and men to the destination and assemble them there (given the fact the country has rail network among other things). My question is whether there is any other possibility (that I have overlooked) to place fortress artillery unit in Hamburg without actually building required industry there?