I hope I'm not misreading your comment but it sounds a little to casual, no? An invasion by sea would probably be a lot more brutal than what's happening in the Ukraine, with a lot more civilian and military casualties, and of course a much bigger impact on the world economy. And of course, countries succeeding with territorial expansions would set a really bad precedent for the 21st century.

We should hope to sit out difficult geopolitical situations as long as possible. The world will probably be a lot different in 20 and 50 years. In Germany we had 40 years of separation and cold war and then suddenly - happy reunification!