The Southern German states which up to this point had not joined the Bund, were Bavaria, Baden, Wurtemberg, Hesse-Darmstadt, and Lichtenstein, with a joint area of 43,990 square miles, and a total population (1866) of 8,524,460. But, though these states were not formally members of the Bund, they were so practically, for they were bound to Prussia by treaties of alliance offensive and defensive, so that in the event of a war the king of Prussia would have at his disposal an armed force of upward of 1,100,000 men.

During the next few years the North German Confederation was employed in consolidating and strengthening itself, and in trying to induce the southern states to join the league. The Zollverein was remodelled and extended, until by the year 1868 every part of Germany was a member of it, with the exception of the cities of Hamburg and Bremen, and a small part of Baden. This paved the way for the formal entrance of the southern states into the confederation; but they still hung back, though the ideal of a united Germany was gradually growing in force and favor.

Meanwhile the terms of the treaty of Prague, together with the complete removal of alien powers from Italy, had wrought a radical change in the political relations of the European States. Excluded from Germany, the dominions of Austria still extended to the verge of Venetia and the Lombard plains, but her future lay eastward and her centre of gravity had been removed to Buda-Pesth. In the South German courts, no doubt, there was a bias toward Vienna, and a dislike of Prussia; yet both the leaning and the repugnance were counterbalanced by a deeper dread of France rooted in the people by the vivid memories of repeated and cruel invasions. Russia, somewhat alarmed by the rapid success of King William, had been soothed by diplomatic reassurances, the tenor of which is not positively known, although a series of subsequent events more than justified the inference made at that time, that promises, bearing on the czar's Eastern designs, were tendered and accepted as a valuable consideration for the coveted boon of benevolent neutrality, if not something more substantial. Like Russia, France had lost nothing by the campaign of 1866; her territories were intact; her ruler had mediated between Austria and Prussia; and he had the honor of protecting the pope, who, as a spiritual and temporal prince, was still in possession of Rome and restricted territorial domains. But the Napoleonic court, and many who looked upon its head as a usurper, experienced, on the morrow of Sadowa, and in a greater degree after the preface to a peace had been signed at Nikolsburg, a sensation of diminished magnitude, a consciousness of lessened prestige, and a painful impression that their political, perhaps even their military place in Europe, as the heirs of Richelieu, Louis XIV., and Napoleon, had been suddenly occupied by a power which they had taught themselves to contemn as an inferior. Until the summer of 1866 the emperor Napoleon fancied that he was strong enough to play with Bismarck a game of diplomatic chess.

In that he erred profoundly. As early as the first week in August, 1866, M. Benedetti, the French ambassador to the court of Berlin, was instructed to claim the left bank of the Rhine as far as and including Mainz. Bismarck replied that "the true interest of France is not to obtain an insignificant increase of territory, but to aid Germany in constituting herself after a fashion which will be most favorable to all concerned." Delphos could not have been more oracular. But Napoleon III. could not or would not heed. A week later Benedetti was instructed to submit a regular scale of concessions—the frontiers of 1814 and the annexation of Belgium, or Luxemburg and Belgium, Benedetti received the most courteous attention and nothing more. This was irritating. The French had been accustomed for more than two hundred years to meddle directly in Germany and find there allies, either against Austria, Prussia, or England; and the habit of centuries had been more than confirmed by the colossal raids, victories, and annexations of Napoleon I. A Germany which should escape from French control and reverse, by its own energetic action, the policy of Henry IV., Richelieu, Louis XIV., his degenerate grandson, Louis XV., and of the great Napoleon himself, was an affront to French pride, and could not be patiently endured. The opposing forces which had grown up were so strong that the wit of man was unable to keep them asunder; and all the control over the issue left to kings and statesmen was restricted to the fabrication of means wherewith to deliver or sustain the shock, and the choice of the hour, if such choice were allowed.

Then presently the opportunity occurred. On July 4, 1870, the throne of Spain was offered to Prince Leopold of Hohenzollern. The fact created the greatest excitement in France. Threatening speeches were made. On July 18 Prince Leopold declined the offer. On the morrow Benedetti was instructed to demand a guarantee that any future offer of the kind would be refused. The king of Prussia would not listen to the proposition. The French minister, through whom the demand had been transmitted, then asked for his passports. War was imminent.

At the prospect Paris grew mad with enthusiasm. Crowds assembled in the streets, shouting "Down with Prussia!" "Long live France!" "To the Rhine!" "To Berlin!" The papers abounded with inflammatory appeals, and, after the impulsive French fashion, glorified beforehand the easy triumphs that were to be won over the Prussians. Men told one another that they would be across the Rhine in a week, and at Berlin in a fortnight. The excitement in Prussia was not less than that in France. The people, with scarcely an exception, declared their readiness for war, and seemed to find a pleasure in the opportunity now presented for settling old quarrels. Like the people of Paris, the Prussians shouted "To the Rhine!" The French cry of "To Berlin!" had its counterpart in the German ejaculation of "To Paris!"

Perhaps a sentence spoken by M. Guyot Montpayroux best illustrates the predominant feeling. "Prussia," he said, "has forgotten the France of Jena, and the fact must be recalled to her memory." Thus was war declared on the night of July 15. Thiers, who desired a war with Prussia "at the proper time," has left on record his judgment that the hour then selected was "detestably ill-chosen." Yet even he and Gambetta were both anxious that "satisfaction" should be obtained for Sadowa; while the thought which animated the court is admirably expressed in the phrase imputed to the empress who, pointing to the prince imperial, said, "This child will never reign unless we repair the misfortunes of Sadowa." Such was the ceaseless refrain. The word haunted French imaginations incessantly, and it was the pivot on which the imperial policy revolved; it exercised a spell scarcely less powerful and disastrous upon monarchists like Thiers and republicans like Gambetta. Long foreseen, the dread shock, like all grave calamities, came nevertheless as a surprise, even upon reflective minds. Statesmen and soldiers who looked on, while they shared in the natural feelings aroused by so tremendous a drama, were also the privileged witnesses of two instructive experiments on a grand scale—the processes whereby mighty armies are brought into the field, and the methods by means of which they are conducted to defeat or victory.

The French field army, called at the outset the "Army of the Rhine," consisted nominally of 336,000 men with 924 guns. It was considered that of these, 300,000 would be available for the initial operations. The infantry of the army was provided with a breech-loading weapon, called after its inventor the Chassepot. The Chassepot was a weapon in all respects superior to the famous needle-gun, which was still the weapon of the Prussian army. Attached likewise to the divisional artillery was a machine gun called the Mitrailleuse, from which great things were expected. But this gun had been manufactured with a secrecy which, while it prevented foreign inspection, had withheld also the knowledge of its mechanism from the soldiers who were to work it. In the field, therefore, it proved a failure.

Since the Crimean and Austrian wars, while the armies of the other European states had advanced in efficiency, the French army had deteriorated. The reason was that favoritism rather than merit had been made the road to court favor. The officers who had pointed to the training of the Prussian soldiers, as indicating the necessity for the adoption of similar modes for the French army, had been laughed at and left in the cold. The consequence was, that for ten years prior to the war of 1870, the French army had received instruction only of the most superficial character. It had been considered sufficient if the soldiers were brought to the point of making a good show on the parade ground. Little more had been required of them. Field training and musketry training had been alike neglected. The officers had ceased to study, and the government had taken no pains to instruct them. What was more vicious still, the alienation between officers and men, which had been noticed even in the war of 1859, had widened. The officers generally had ceased to take the smallest interest in the comfort of the men in camp or in quarters. These matters were left to the non-commissioned officers. Needless to add, they were not always properly attended to. It may be added that the system of drill was so devised as to give no play to the reasoning powers of the officer. He was a machine and nothing more.

Of the artillery of the French army it has to be said, that it was far inferior to that of the Germans, and known to be so by the French war department. In the matter of reserves, France had comparatively nothing.