Original sentence: The Reign of Terror (September 5 1793 – July 28 1794) or simply The Terror (French: la Terreur) was a period of about ten months during the French Revolution when struggles between rival factions led to mutual radicalization which took on a violent character with mass executions by guillotine.The term "French Revolution" is sometimes used to avoid confusion between the phrase and the time period itself
Edited sentence: The Reign of Terror (September 5 1793 – July 28 1794) or simply The Terror (French: la Terreur) was a period of about eleven months during the French Revolution when struggles between rival factions led to mutual radicalization which took on a violent character with mass executions by guillotine.The term "French Revolution" is preferred so one doesn't get confused between the phrase and the time period itself