The partition of Czechoslovakia was brutal and cynical. Munich destroyed even the formal, fragile guarantees that remained on the continent. It showed that mutual agreements were worthless. It was the Munich Agreement that served as a “trigger” and made the great war in Europe inevitable.
The attachment by referendum of Crimea to Russia in 2014 is described by Russian senators as the fruit of the voluntary reunification of the region with Russia.
Recurrent disinformation about the illegal annexation of Crimea.
A referundum is is a direct and universal vote in which an entire electorate is invited to vote on a particular proposal. It has to comply with strict rules during the campaign, during the vote and after the vote to establish the results. The vote was quickly organised in March 2014 under illegal Russian occupation without complying with either the Ukrainian nor Russia electoral codes, therefore cannot be called a referundum.
The annexation has been condemned by the UNGA (see the resolution A/RES/68/262 on the territorial integrity of Ukraine). No international body recognises the so-called referendum, announced on 27 February 2014 and held on 16 March 2014. A year after the illegal annexation, Russian President Vladimir Putin admitted that the plan to annex Crimea was ordered weeks before the so-called referendum.
The European Union does not recognise Crimea's annexation and continues to condemn it as a violation of international law. EU sanctions continue to be in place against Russia as a consequence of the annexation. For the EU's statement on the sixth anniversary of Crimea annexation see here.