Many people remember pre WW2-period as Hitler unilaterally annexing territories left and right. As you can see, it wasn't quite the case. These were international agreement carving Europe in favour of nazis and their allies as an attempt to appease an unhinged genocidal war criminal and his friends.

Carving out of Czechoslovakia was greenlighted by the Western powers. Austria "voluntarily" anschlussed itself to Germany. Splitting Poland in half was a deal between nazis and people who only a couple of years later would lose millions of people fighting for it's liberation from the nazis.

Remember this everytime your politician suggest we have to "save face" of a a certain Ruzzian strongman. History repeats itself but it doesn't have to.