The Battle of Minden was a major engagement during the Seven Years' War, fought on 1 August 1759. An Allied army, under the overall command of Prussian Field Marshal Ferdinand of Brunswick, defeated a Franco-Saxon army commanded by Marshal of France, Marquis de Contades. Two years previously, the French had launched a successful invasion of Hanover and attempted to impose an unpopular peace treaty upon the Allied nations of Britain, Hanover and Prussia. After a Prussian victory at Rossbach and under pressure from the Prussian king Frederick the Great and the British prime minister William Pitt, King George II disavowed the treaty. In 1758, the Allies launched a counter-offensive against the French and Saxon forces and drove them back across the Rhine.
After the Allies failed to defeat the French before reinforcements swelled their retreating army, the French launched a fresh offensive, capturing the fortress of Minden on 10 July. Believing Ferdinand's forces to be over-extended, Contades abandoned his strong positions around the river Weser and advanced to meet the Allied forces in battle. The decisive action of the battle occurred when six British and two Hanoverian line infantry regiments repelled repeated French cavalry attacks. In the wake of the failed cavalry attack, the Allied line advanced and sent the Franco-Saxon army reeling from the field. The battle ended all French designs upon Hanover for the remainder of the year and formed in Britain part of the Annus Mirabilis of 1759.
Background
The western German-speaking states of Europe had been a major theatre of the Seven Years' War since 1757, when the French had launched an invasion of Hanover. That culminated in a significant victory for the French at the Battle of Hastenbeck and the attempted imposition of the Convention of Klosterzeven upon the defeated Allies: Hanover, Prussia and Britain. Prussia and Britain refused to ratify the convention, and in 1758, a counter-offensive commanded by Ferdinand saw French forces first driven back across the Rhine and then beaten at the Battle of Krefeld. The Prussian port of Emden was also recaptured, which secured supply lines from Britain. In fact, the British government, which had previously been opposed to any direct involvement on the Continent, took the opportunity of the 1758–59 winter break in fighting to send 9,000 British troops to reinforce Ferdinand. The French crown also sent a reinforcing army, under Contades, in the hope that would help to secure a decisive victory, swiftly conclude the costly war and force the Allies to accept the peace terms that France was seeking.
In an attempt to defeat the French before their reinforcements arrived, Ferdinand decided to launch a fresh counter-offensive and quit his winter quarters early. In April, however, Victor-François, duc de Broglie, and the French withstood Ferdinand's attack at the Battle of Bergen, and de Broglie was promoted to Marshal of France. Ferdinand was forced to retreat northwards in the face of the now reinforced French army. Contades, the senior of the two French marshals, resumed the advance and occupied a number of towns and cities, including the strategic fortress at Minden, which fell to the French on 10 July. Ferdinand was criticised for his failure to check the French offensive. His celebrated brother-in-law, Frederick the Great, was reported as having suggested that since his loss at Bergen, Ferdinand had come to believe the French to be invincible. Irrespective of any presumed crisis of confidence, however, Ferdinand ultimately decided to confront the French near Minden. Including unengaged troops, the French army consisted of 42,000 infantry, 10,000 cavalry and 162 cannon, and the Allied army numbered 45,000 men and 170 cannon, including a British contingent of 10,000 infantry and cavalry commanded by Lieutenant General Lord George Sackville.
Contades had taken up a strong defensive position along the Weser around Minden, where he had paused to regroup before he continued his advance. He initially resisted the opportunity to abandon the strong position and attack Ferdinand, who instead formulated a plan that involved splitting his force into several groups to threaten Contades's lines of supply. Perceiving Ferdinand's forces to be over-extended, Contades thought that he saw a chance for the desired decisive victory. He ordered his men to abandon their defensive encampments and advance into positions on the plain west of Minden during the night of 31 July and the early morning of 1 August.
Topography
The city of Minden lies at the confluence of the northwards flowing Weser and the Bastau, a marshy tributary rivulette coming from the west. The Battle of Minden took place on the plain in front of the city and its fortifications to its northwest, with the Weser and the Bastau lying behind the city to its east and south respectively.
On 31 July, the French troops, under Contades's direct command, had their positions west of the Weser and south of the Bastau and crossed to the north over five pontoons during the night and early morning of the 1 of August. The French, under Junior Marshal de Broglie, were stationed astride the Weser. Some occupied Minden on 31 July, and the remainder, stationed east of the Weser, crossed over to join them during the night.
Battle
In an exception to the norm for the era, Contades placed his artillery in the centre protected only by the cavalry, with his infantry on each flank. The battle began on the French right flank, where Marshal de Broglie, who commanded the reserve, began an artillery duel against the Allied left.
The decisive action of the battle took place in the centre, famously because of a misunderstanding of orders. Friedrich von Spörcken's division, composed of the infantry of the British contingent of the Allied army (two brigades under Earl Waldegrave and William Kingsley) and supported by the Hanoverian Guards, advanced to attack the French cavalry. It is reported that they had been ordered "to advance [up-]on the beating of drums" (i.e., advance when the signal drums begin to beat,) misunderstanding this as "to advance to the beating of drums" (i.e., advance immediately while beating drums.) Since the French cavalry was still in its ranks and the 'hollow square' infantry defence had not yet been developed, it was assumed by all that the six leading British regiments were doomed. Despite being under constant artillery fire, the six regiments (soon supported by two Hanoverian battalions), by maintaining fierce discipline and closed ranks, drove off repeated cavalry charges with musket fire and inflicted serious casualties on the French. Contades reportedly said bitterly, "I have seen what I never thought to be possible—a single line of infantry break through three lines of cavalry, ranked in order of battle, and tumble them to ruin!"
Supported by the well-served British and Hanoverian artillery, the entire Allied line eventually advanced against the French army and sent it fleeing from the field. The only French troops capable of mounting any significant resistance were those of de Broglie, who formed a fighting rear guard.
The following is an account of the battle by Lt. Hugh Montgomery of the 12th Regiment of Foot to his mother: