What is in the Ukraine and specifically Crimea that the Russians want. Is it resources? Is it fast access to the Black Sea? Why did they go so fast for Crimea?
The Black Sea Fleet’s base is on Crimea at Sevastopol. Also, it’s the only part of Ukraine where more citizens describe themselves as Russians than as Ukrainians. It’s accessible by sea and it’s almost an island so a Russian position there would be defensible. And they fought to defend Sevastopol in two wars, so there’s an emotional appeal. All in all, it’s a little like their Florida.