Following the collapse of the 1814 campaign, Napoleon Bonaparte, Rod Steiger, is forced to abdicate under pressure from his marshals and is exiled to Elba with a small guard. After a year, he escapes and once more rallies the French to his banner. In the same upheaval, Louis XVIII flees the throne, a shift that sends the European powers back toward war. In Brussels, at the Duchess of Richmond's ball, the looming threat becomes real as the Duke of Wellington, Christopher Plummer, learns that Napoleon is marching into Belgium, a revelation that pushes him to coordinate a strategy that could split the allied forces. The decision, ultimately, is to halt Napoleon at Waterloo, a moment that will redefine the balance of Europe.
At Quatre-Bras, Marshal Ney, Dan O'Herlihy in the part, fights the British to a draw, while Napoleon defeats the Prussians at Ligny. Ney rides quickly to report, and in doing so inadvertently lets Wellington pull his lines back intact. Seeing the moment, Napoleon commands Grouchy, Charles Millot, to lead about 30,000 troops against the Prussians to prevent their rejoining the British, while he concentrates his remaining forces on striking Wellington.
On 18 June 1815 the Battle of Waterloo erupts with a heavy French artillery opening. Napoleon tries feints against Wellington’s flanks at Hougoumont and La Haye Sainte, but the British commander keeps his main force disciplined and ready. General Picton, Jack Hawkins as General Sir Thomas Picton, is sent to seal a vulnerable gap when a Dutch brigade falters, and he pays with his life. Ponsonby, Michael Wilding as Colonel Sir William Ponsonby, leads a daring cavalry charge toward the French guns but becomes isolated from the main Allied force and falls to a shower of lancers.
As the day unfolds, troops arriving from the east are met with uncertainty; Wellington suspects Grouchy’s advance while Blücher, the Prussian commander, Sergo Zakariadze presses toward the field to tip the scales. Napoleon, troubled by stomach pains, briefly withdraws and leaves Ney in command. A misinterpreted order to the Allied troops to retire 100 paces is taken as a full withdrawal by Ney, who responds with renewed vigor and a bold cavalry assault against the British lines. Yet the British squares hold firm, inflicting heavy losses on the French.
The battle’s momentum shifts as La Haye Sainte falls and Napoleon commits the Imperial Guard to deliver the decisive blow. In the pivotal moments that follow, Maitland’s 1st Foot Guards deliver a brutal, close-range volley that shatters the Imperial Guard’s assault, a turning point that the arrival of Blücher helps seal. For the first time in its history, the Imperial Guard collapses, and the Allied forces claim a hard-won victory at Waterloo.
That evening, Wellington walks the field among the thousands of casualties, reflecting on the blood price of the day. Napoleon, though he survives, is urged by his marshals to flee while there is still a path to escape, a cautionary note that echoes the fragile fate of empires and the uncertain future that lies ahead.
