Louis-Alexandre Berthier

Louis-Alexandre Berthier (20 November 1753 – 1 June 1815), Prince of Neuchâtel and Valangin, Prince of Wagram, was a French military commander who served during the French Revolutionary Wars and the Napoleonic Wars. He was twice Minister of War of France and was made a Marshal of the Empire in 1804. Berthier served as chief of staff to Napoleon Bonaparte from his first Italian campaign in 1796 until his first abdication in 1814. The operational efficiency of the Grande Armée owed much to his considerable administrative and organizational skills.