Claim: Pierre Louis Prieur  (1 August 1756 – 31 May 1827) was a French lawyer and secretary to the National Constituent Assembly from Sommesous who served as a deputy to the National Convention and was dispatched to Brittany where he established a local version of the Reign of Terror.
Evidence: Pierre Louis Prieur (Prieur de la Marne) (1 August 1756 – 31 May 1827) was a French lawyer elected to the Estates-General of 1789. He became secretary to the National Constituent Assembly, and the violence of his attacks on the ancien régime won him the pun nickname of Crieur de la Marne ("Shouter of the Marne"). Born in Sommesous (Marne), Prieur practised as a lawyer at Châlons-sur-Marne until 1789, when he was elected to the States-General. During the French Revolution he served as a deputy to the National Convention and held membership in the Committee of Public Safety. He voted for the death of King Louis XVI, and as a member of the Committees of National Defence and of Public Safety he was despatched in October 1793 to Brittany, where he established the local version of the Reign of Terror.