Complex sentence: Did the Allies launch a clandestine operation to overthrow the Bolsheviks and if so, did the Cheka uncover the plot at the eleventh hour or did they know of the conspiracy from the outset ?
Split into simpler sentences: Did the Allies launch a clandestine operation to overthrow the Bolsheviks? If so, did the Cheka uncover the plot at the eleventh hour or did they know of the conspiracy from the outset?