The question is, does what Putin is doing resemble more...
A. Hitler and Czechoslovakia
or
B. The Turks in Northern Cyprus (and by the way, they are still there almost 50 years later), is anybody asking the Turks to get out of Cyprus?
C. Most US Presidents enforcing the Monroe Doctrine since 1823. Putin doesn't want a hostile alliance on his vulnerable southern border, 300 miles from Moscow. Or to lose his only warm water port (Sevastopol, Crimea).