(0. Fr. la cuzon, disturbance), the name given to the Franc-Comtois leader Claude Prost (1607-1681), who was born at Longchaumois (department of Jura) on the 17th of June 1607. He gained his first military experience when the French invaded Burgundy in 1636, harrying the French troops from the castles of Montaigu and St Laurent-la-Roche, and devastating the frontier districts of Bresse and Bugey with fire and sword (1640-1642). In the first invasion of FrancheComte by Louis XIV. in 1668 Lacuzon was unable to make any effective resistance, but he played an important part in Louis's second invasion. In 1673 he defended Salins for some time; after the capitulation of the town he took refuge in Italy. He died at Milan on the 21st of December 1681.