Pope Pius VI (Italian: Pio VI; born Count Giovanni Angelo Braschi, 25 December 1717 29 August 1799) was head of the Catholic Church and ruler of the Papal States from 15 February 1775 to his death in 1799.Pius VI condemned the French Revolution and the suppression of the Gallican Church that resulted from it. French troops commanded by Napoleon Bonaparte defeated the papal army and occupied the Papal States in 1796. In 1798, upon his refusal to renounce his temporal power, Pius was taken prisoner and transported to France. He died eighteen months later in Valence. His reign of over two decades is the fifth-longest in papal history.

Louis-Alexandre Berthier (20 November 1753 – 1 June 1815), Prince of Neuchâtel and Valangin, Prince of Wagram, was a French Marshal of the Empire who served during the French Revolutionary Wars and the Napoleonic Wars. He was twice Minister of War of France and served as chief of staff to Napoleon Bonaparte.

Born into a military family, Berthier served in the French Army and survived suspicion of monarchism during the Reign of Terror before a rapid rise in the ranks of the French Revolutionary Army. Although a key supporter of the coup against the Directory that gave Napoleon supreme power, and present for his greatest victories, Berthier strongly opposed the progressive stretching of lines of communication during the Russian campaign. Allowed to retire by the restored Bourbon regime, he died of unnatural causes shortly before the Battle of Waterloo. Berthier's reputation as a superb operational organiser remains strong among current historians.