what was the reign of terror in 3 sentence

The Reign of Terror was a period during the French Revolution from 1793-1794, characterized by mass executions and political repression. It was led by the Committee of Public Safety, headed by Maximilien Robespierre, who believed it was necessary to use extreme measures to protect the revolution and eliminate counter-revolutionaries. During this time, thousands of people, including nobles, clergy, and even fellow revolutionaries, were executed by guillotine.