One thing is that Russia always will sit in Crimea and it is impossible to kick them out.
Plus politically to allow Crimea not to be in russia will be suicide for any party.
Big stuff is this Sevastopol and these curorts.
Stalin, when get lesson from Hitler, after war ended...
Immediately ordered to expand tunnels and bunkers network, to build even underground warehouses, like 2-3 floors above ground, 2-3 floors below ground and under this...shelters.
Also a lot shelters under buildings...
Underground warehouses, storages.
1945-1980 was 35 years long period with really huge investments to build warehouses, bunkers, shelters and nuclear shelters...
It isn't Azovstal plant, it is....far more difficult target to deal with.
Almost impossible...
USSR turned Sevastopol in gigantic weapons warehouse + with shopisticated shelters and bunkers, tunnels network.
In fear from nuclear war USSR ordered in Crimean curort cities to build shelters and nuclear shelters.
They also does have huge sentiment about Crimea: it was place where Soviet elite had villas...
It was area with hotels and sanatoriums for, let's say priviliged social class in USSR.
Casuals, if they get to spend vacation in Crimea were proud and it was...some special thing.