Karl Wilhelm Ferdinand, Duke of Brunswick (1735-1806)

Karl Wilhelm Ferdinand, Duke of Brunswick-Wolfenbüttel (9 October 1735 – 10 November 1806) was the ruling prince of Brunswick-Wolfenbüttel and a senior Prussian commander who held the rank of Generalfeldmarschall. He commanded Coalition forces during the opening campaign against Revolutionary France in 1792 and later led Prussian field operations on the Rhine in 1793 before returning to high command in 1806, when he was mortally wounded at Auerstedt.

Born at Wolfenbüttel, Karl Wilhelm Ferdinand was the heir (Erbprinz) of the Brunswick-Wolfenbüttel line and entered military service in the mid-18th century. During the Seven Years’ War (1756–1763), he served with the allied north-German forces organized to defend Hanover and northern Germany, initially under the Duke of Cumberland and thereafter under his uncle, Duke Ferdinand of Brunswick. In this period he took part in Major actions against French forces in western Germany and developed a reputation as a capable subordinate commander within the Anglo-German coalition system.

In 1787, he was appointed a Prussian Generalfeldmarschall and placed in command of the Prussian intervention in the Dutch Republic. The operation restored the authority of the stadtholder, William V of Orange, after the collapse of Patriot resistance, and concluded with the occupation or capitulation of Major Dutch cities during September–October 1787.

At the outbreak of war with Revolutionary France, Austria and Prussia combined their principal field forces and placed them under Brunswick’s command. From Koblenz he issued the proclamation of 25 July 1792 (commonly called the Brunswick Manifesto). The Coalition advance entered northeastern France, taking key frontier fortresses and moving toward the Argonne; the campaign culminated in the French stand at Valmy (20 September 1792), after which Brunswick withdrew and, during the subsequent retreat, abandoned Verdun and Longwy before returning into Germany.

In 1793 Brunswick held senior command on the Rhine front. His forces participated in operations around Mainz and opposed the French Army of the Moselle in the Saar region. In September 1793 Prussian troops under his direction defeated French attacks at Pirmasens, and in late November 1793 a Coalition force under Brunswick repulsed repeated French assaults at Kaiserslautern. He resigned his command in 1794, objecting to political interference from Berlin.

Prussia did not field him in the Coalition wars that followed, but in 1806—at the opening of the War of the Fourth Coalition—Brunswick returned to command despite his age. On 14 October 1806, at the Battle of Auerstedt, his army was defeated by French forces under Marshal Davout. Brunswick was mortally wounded in the fighting and died on 10 November 1806 at Ottensen, near Hamburg.

Sources

• Bayerische Staatsgemäldesammlungen (Sammlung): “Herzog Carl I. Wilhelm Ferdinand von Braunschweig-Wolfenbüttel, um 1762”
• Encyclopaedia Britannica: “Charles William Ferdinand of Brunswick”
• Napoleon.org: “BRUNSWICK-LÜNEBURG, Charles William Ferdinand, Duke of”
• Wikipedia (English): “Charles William Ferdinand, Duke of Brunswick”
• Hanover Historical Texts Project: “The Proclamation of the Duke of Brunswick, 1792”
• Encyclopaedia Britannica: “French Revolutionary wars — Campaigns of 1793”