Napoleon welcomed the renewal of war. He understood that until he had completely broken the power of Great Britain all his Continental designs were imperiled and his colonial and commercial projects hopeless. The humiliation of the great rival across the Channel would be the surest guarantee of the prosperity of the French bourgeoisie, and it was in last analysis from that class that his own political support was chiefly derived. The year 1803-1804 was spent by the emperor in elaborate preparations for an armed invasion of England. Along the Channel coast were gradually collected at enormous cost a host of transports and frigates, a considerable army, and an abundance of supplies. To the amazing French armament, Spain was induced to contribute her resources.
[Sidenote: The Third Coalition Against France]
Great Britain replied to these preparations by covering the Channel with a superior fleet, by preying upon French commerce, and by seizing Spanish treasure-ships from America. And William Pitt, the very embodiment of the Englishman's prejudice against things French, returned to the ministry of his country. Pitt was unwilling to risk British armies against the veterans of Napoleon, preferring to spend liberal sums of money in order to instigate the Continental Powers to combat the French emperor. Pitt was the real bone and sinews of the Third Coalition, which was formed in 1805 by Great Britain, Austria, Russia, and Sweden to overthrow Napoleon.
Austria naturally smarted under the provisions of the treaty of Lunéville quite as much as under those of Campo Formio. Francis II was aroused by French predominance in Italy and now that he himself had added the title of "hereditary emperor of Austria" to his shadowy dignity as "Holy Roman Emperor" he was irritated by the upstart Napoleon's assumption of an imperial title.
In Russia the assassination of the Tsar Paul, the crazy admirer of Bonaparte, had called to the throne in 1801 the active though easily influenced Alexander I. In early life Alexander had acquired a pronounced taste for revolutionary philosophy and its liberal ideas, and likewise a more or less theoretical love of humanity. Now, Pitt persuaded him, with the assistance of English gold, that Napoleon was the enemy both of true liberty and of humanity. So the tsar joined his army with that of Austria, and in the autumn of 1805 the allies advanced through southern Germany toward the Rhine.
Pitt had done his best to bring Prussia into the coalition, but the Prussian king, Frederick William III (1797-1840), was timid and irresolute, and, despite the protests of his people, was cajoled by Napoleon's offer of Hanover into a declaration of neutrality. Bavaria and Württemberg, from fear of Austria, became open allies of the French emperor.
[Sidenote: Napoleon vs. Austria]
Before the troops of the Third Coalition could threaten the eastern frontier of France, Napoleon abandoned his military projects against Great Britain, broke up his huge armaments along the Atlantic coast, and, with his usual rapidity of march, hurled his finely trained army upon the Austrians near the town of Ulm in Württemberg. There, on 20 October, 1805, the Austrian commander, with some 50,000 men, surrendered, and the road to Vienna was open to the French.
[Sidenote: Trafalgar (1805) and the Continued Sea Power of Great
Britain]
This startling military success was followed on the very next day by a naval defeat quite as sensational and even more decisive. On 21 October, the allied French and Spanish fleets, issuing from the harbor of Cadiz, encountered the British fleet under Lord Nelson, and in a terrific battle off Cape Trafalgar were completely worsted. Lord Nelson lost his life in the conflict, but from that day to the close of the Napoleonic Era British supremacy on the high seas was not seriously challenged.