a1) Nazi leader Adolf Hitler violates the Treaty of Versaille and moves troops into the Rhineland.
a2) Russian President Putin invades Georgia on a pretext that was clearly prepared in advance - my apologies to the people of Georgia comparing the invasion of their country with a troop movement - I am doing this only to try and wake people up and present a reality not lessen your sacrifice or ignoring that the west was clearly silent.
b1) Nazi leader Adolf Hitler began the occupation of Czechoslovakia with the annexation of Czechoslovakia's northern and western border regions, known collectively as the Sudetenland and the west agreed and was silent.
b2) Russian President Putin annexed the Crimea region of the Ukraine and the west saw it but generally was silent.
c1) When Hitler marched his troops into Czechoslovakia in March 1939, it became clear that appeasement had failed and Chamberlain guaranteed to defend Poland if Germany invaded.
c2) Russian President Putin invaded eastern Ukraine the west made vague promises that did not even meet the promises to Ukraine when they surrendered their nuclear weapons (Google it, I have nothing to add).
What more do you want?, more appeasement? do not be lied to here we are almost past the point of no return the action now needs to be loud and clear or we will get more of this until that madman is at our door.
Appeasement was a method for the western allies i.e. the British and the French to give them time to wake up their populations to prepare for war and rearm for a new war, both nations did this but time ran out so France was occupied by Hitler. Historically Chamberlain is seen as a fool, in reality he bought us time but we need to use that time correctly! Fortunately for history the English channel afforded the British more time to prepare so they could hold the line but not move it back without help, this pushed Hitler to turn on his allies astonishingly the Russian's who appear to have learned the wrong part of this lesson and who are deemed to repeat his mistakes unless the people in Russia stand up to be counted to stop this inevitable collapse into insanity that Putin is pushing.