Fall of the Republic (Earth-2042)

"What I remember about the rise of the Empire is... is how quiet it was. During the waning hours of the Clone Wars, the 501st was discreetly transferred back to Coruscant. It was a silent trip; everyone knew what was about to happen. Did they have any doubts? Any private traitorous thoughts? Perhaps, but no one said a word. Not on the flight to Coruscant, not when Order 66 came down, and not when they marched into the Jedi Temple. Not a word."

- Unidentified retired ODST of the 105th Shock Troops Division

The Fall of the Republic, also known as the Age of the Republic, was a period of time that referred to the last thirteen years of the Galactic Republic's existence.

Source

 * https://starwars.fandom.com/wiki/Fall_of_the_Republic