Complex sentence: Not all attempts at regime change bring about state collapse: the Bay of Pigs invasion of Cuba, the Decembrist revolt in Russia and the Babington plot to assassinate Queen Elizabeth I of England, were ineffective.
Split into simpler sentences: Not all attempts at regime change bring about state collapse. The Babington plot to assassinate Queen Elizabeth I of England, the Decembrist revolt in Russia, and the Bay of Pigs invasion of Cuba were ineffective.