Totally take that on board and the views, but of course, where were we all when he took Crimea..................he was left to establish his Navy base and assets, and is simply building on the access to it from Russia. We never said boo to the goose!!
If "we" wanted to rattle the Lions cage, we should get Ukraine signed up to NATO ASAP and then see what happens, otherwise what you say will inevitably happen, he will not stop, until he has ALL of the old states back under his control. Ukraine appears to have delayed joining, but clearly not all their fault they had to meet certain criteria and sadly it didn't happen in the last 8 years.
There are so many countries literally at the same crucial point!
Strong leadership from FREE countries is what is needed, but this is hell of a subject matter to get right, when you have a mindless thug in charge who cares not about Russian or Slav lives.