Battle of Waterloo
The Battle of Waterloo was fought on Sunday 18 June 1815, near Waterloo, marking the end of the Napoleonic Wars. The French Imperial Army under the command of Napoleon I was defeated by two armies of the Seventh Coalition. One was a British-led force with units from the United Kingdom, the Netherlands, Hanover, Brunswick, and Nassau, under the command of field marshal Arthur Wellesley, Duke of Wellington. The other comprised three corps of the Prussian army under Field Marshal Blücher. The battle was known contemporaneously as the Battle of Mont Saint-Jean in France and La Belle Alliance in Prussia.
Upon Napoleon's return to power in March 1815, the beginning of the Hundred Days, many states that had previously opposed him formed the Seventh Coalition to oppose him again, and hurriedly mobilised their armies. Wellington's and Blücher's armies were cantoned close to the northeastern border of France. Napoleon planned to attack them separately, before they could link up and invade France with other members of the coalition. On 16 June, Napoleon successfully attacked the bulk of the Prussian Army at the Battle of Ligny with his main force, while a small portion of the French Imperial Army contested the Battle of Quatre Bras to prevent the Anglo-allied army from reinforcing the Prussians. The Anglo-allied army held their ground at Quatre Bras but were prevented from reinforcing the Prussians, and on the 17th, the Prussians withdrew from Ligny in good order, while Wellington then withdrew in parallel with the Prussians northward to Waterloo on 17 June. Napoleon sent a third of his forces to pursue the Prussians, which resulted in the separate Battle of Wavre with the Prussian rear-guard on 18–19 June and prevented that French force from participating at Waterloo.
Upon learning that the Prussian Army was able to support him, Wellington decided to offer battle on the Mont-Saint-Jean escarpment across the Brussels Road, near the village of Waterloo. Here he withstood repeated attacks by the French throughout the afternoon of 18 June, and was eventually aided by the progressively arriving 50,000 Prussians who attacked the French flank and inflicted heavy casualties. In the evening, Napoleon assaulted the Anglo-allied line with his last reserves, the senior infantry battalions of the Imperial Guard. With the Prussians breaking through on the French right flank, the Anglo-allied army repulsed the Imperial Guard, and the French army was routed.
Waterloo was the decisive engagement of the Waterloo campaign and Napoleon's last. It was the second bloodiest single day battle of the Napoleonic Wars, after Borodino. According to Wellington, the battle was "the nearest-run thing you ever saw in your life". Napoleon abdicated four days later, and coalition forces entered Paris on 7 July. The defeat at Waterloo marked the end of Napoleon's Hundred Days return from exile. It precipitated Napoleon's second and definitive abdication as Emperor of the French, and ended the First French Empire. It set a historical milestone between serial European wars and decades of relative peace, often referred to as the Pax Britannica. In popular culture, the phrase "meeting one's Waterloo" has become an expression for experiencing a catastrophic reversal or undoing.
Prelude
On 13 March 1815, six days before Napoleon I reached Paris, the powers at the Congress of Vienna declared him an outlaw. Four days later, the United Kingdom, Russia, Austria, and Prussia mobilised armies to defeat Napoleon. Critically outnumbered, Napoleon knew that once his attempts at dissuading one or more members of the Seventh Coalition from invading France had failed, his only chance of remaining in power was to attack before the coalition mobilised.Had Napoleon succeeded in destroying the existing coalition forces south of Brussels before they were reinforced, he might have been able to drive the British back to the sea and knock the Prussian Empire out of the war. Crucially, this would have bought him time to recruit and train more men before turning his armies against the Austrians and Russians.
An additional consideration for Napoleon was that a French victory might cause French-speaking sympathisers in Belgium to launch a friendly revolution. Also, coalition troops in Belgium were largely second line, as many units were of dubious quality and loyalty.
The initial dispositions of Wellington, the British commander, were intended to counter the threat of Napoleon enveloping the Coalition armies by moving through Mons to the south-west of Brussels. This would have pushed Wellington closer to the Prussian forces, led by Gebhard Leberecht von Blücher, but might have cut Wellington's communications with his base at Ostend. In order to delay Wellington's deployment, Napoleon spread false intelligence which suggested that Wellington's supply chain from the ports in the English Channel would be cut.
By June, Napoleon had raised a total army strength of about 300,000 men. The force at his disposal at Waterloo was less than one third that size, but the rank and file were mostly loyal and experienced soldiers. Napoleon divided his army into a left wing commanded by Marshal Ney, a right wing commanded by Marshal Grouchy and a reserve under his command. Crossing the frontier near Charleroi before dawn on 15 June, the French rapidly overran Coalition outposts, securing Napoleon's "central position" between Wellington's and Blücher's armies. He hoped this would prevent them from combining, and he would be able to destroy first the Prussian army, then Wellington's.
Only very late on the night of 15 June was Wellington certain that the Charleroi attack was the main French thrust. In the early hours of 16 June, at the Duchess of Richmond's ball in Brussels, he received a dispatch from the Prince of Orange and was shocked by the speed of Napoleon's advance. He hastily ordered his army to concentrate on Quatre Bras, where the Prince of Orange, with the brigade of Prince Bernhard of Saxe-Weimar, was holding a tenuous position against the soldiers of Ney's left wing. Prince Bernhard and General Perponcher were by all accounts better informed of the French advance than other allied officials and their later initiatives to hold the crossroads proved vital for the outcome. General Constant de Rebeque, commander of one of the Dutch divisions, disobeyed Wellington's orders to march to his previous chosen concentration area around Nivelles, and decided to hold the crossroads and send urgent messages to the prince and Perponcher. This fact shows how little Wellington believed in a fast French advance towards Brussels. He did not believe in recent intelligence given to him by General Dörnberg, one of his intelligence officials warning him of numerous French outposts south of Charleroi as well as some reports sent by the intelligence of the Prussian 1st corps. Had these two generals obeyed his orders, Quatre-Bras in all probability would have fallen to the French giving them time to support Napoleon's attack on the Prussians in the Sombreffe area via the fast, cobbled road, and the history of the campaign would have been significantly different.
Ney's orders were to secure the crossroads of Quatre Bras so that he could later swing east and reinforce Napoleon if necessary. Ney found the crossroads lightly held by the Prince of Orange, who repelled Ney's initial attacks but was gradually driven back by overwhelming numbers of French troops in the Battle of Quatre Bras. First reinforcements, and then Wellington arrived. He took command and drove Ney back, securing the crossroads by early evening, too late to send help to the Prussians, who had already been defeated.
Meanwhile, on 16 June, Napoleon attacked and defeated Blücher at the Battle of Ligny, using part of the reserve and the right wing of his army. The Prussian centre gave way under heavy French assaults, but the flanks held their ground. The Prussian retreat from Ligny went uninterrupted and seemingly unnoticed by the French. The bulk of their rearguard units held their positions until about midnight, and some elements did not move out until the following morning, ignored by the French.
Crucially, the Prussians did not retreat to the east, along their own lines of communication. Instead, they, too, fell back northwards parallel to Wellington's line of march, still within supporting distance and in communication with him throughout. The Prussians rallied on Bülow's IV Corps, which had not been engaged at Ligny and was in a strong position south of Wavre.
With the Prussian retreat from Ligny, Wellington's position at Quatre Bras was untenable. The next day he withdrew northwards, to a defensive position that he had reconnoitred the previous year—the low ridge of Mont-Saint-Jean, south of the village of Waterloo and the Sonian Forest.
Napoleon, with the reserves, made a late start on 17 June and joined Ney at Quatre Bras at 13:00 to attack Wellington's army but found the position empty. The French pursued Wellington's retreating army to Waterloo; however, due to bad weather, mud and the head start that Napoleon's tardy advance had allowed Wellington, there was no substantial engagement, apart from a cavalry action at Genappe.
Before leaving Ligny, Napoleon had ordered Grouchy, who commanded the right wing, to follow the retreating Prussians with 33,000 men. A late start, uncertainty about the direction the Prussians had taken, and the vagueness of the orders given to him meant that Grouchy was too late to prevent the Prussian army reaching Wavre, from where it could march to support Wellington. More importantly, the heavily outnumbered Prussian rearguard was able to use the River Dyle to fight a savage and prolonged action to delay Grouchy. Napoleon would get this information from Grouchy on the early morning of 18 June at a nearby farmhouse, La Caillou, where he was staying for the night; he responded to the message in mid-day.
As 17 June drew to a close, Wellington's army had arrived at its position at Waterloo, with the main body of Napoleon's army in pursuit. Blücher's army was gathering in and around Wavre, around to the east of the town. Early the next morning, Wellington received an assurance from Blücher that the Prussian army would support him. He decided to hold his ground and give battle.