This is a very good summary. The only thing missing is a better back story of Crimea. Roughly, for the geographic reasons you noted it was an aspiration and t

This is a very good summary. The only thing missing is a better back story of Crimea. Roughly, for the geographic reasons you noted it was an aspiration and then strategic territory of the Russian Empire for hundreds of years. It was transferred from Russia to Ukraine when they were both part of the USSR as a symbolic gesture and to ease administration.