Most Famous Conspiracy in Government

From Wikipedia:

The assassination of Julius Caesar was the result of a conspiracy by about 60[1] Roman senators who called themselves Liberators. 

To pull it off, a date of relevance was choosen well ahead of time and a “false flag” operation was done on that day to ensure success.

“A nation can survive its fools, and even the ambitious. But it cannot survive treason from within. An enemy at the gates is less formidable, for he is known and carries his banner openly. But the traitor moves amongst those within the gate freely, his sly whispers rustling through all the alleys, heard in the very halls of government itself. For the traitor appears not a traitor; he speaks in accents familiar to his victims, and he wears their face and their arguments, he appeals to the baseness that lies deep in the hearts of all men. He rots the soul of a nation, he works secretly and unknown in the night to undermine the pillars of the city, he infects the body politic so that it can no longer resist. A murderer is less to fear.”

-Cicero

Know that violent and precipitous revolutions almost never work as in that case and many others.