Why Italy made the reservation in the case of England will appear when we glance at the origin of the Triple Alliance.
In 1871 Bismarck thought that the Franco-Prussian war, by the military losses and by the immense indemnity which it inflicted on the French people, had rendered France powerless for a generation. But within four years she paid the indemnity and had so far recovered in her armament, commerce, and prosperity, that the Iron Chancellor prepared to attack her again, and this time, to quote his butcher's phrase, "to bleed her white." Only the certainty that the other powers would interfere stayed his hand then.
So he set about circumventing France by other means. A league of the three Emperors of Germany, Austria, and Russia was the combination he preferred; but Russia proved an uncertain partner, as she feared Germanization, on the one hand, and, on the other, she was the encourager of pro-Slavic aspirations which ran counter to the Germans' ambition. Bismarck, therefore, looked about him for an alternative plan.
He would keep the friendship of Russia—even though Russia declined a formal league—and he would lure Italy into the Germanic alliance. England, he knew, could not be persuaded to enter a Continental combination. Her commercial interests pointed elsewhere, and she still clung to her policy of splendid isolation. But Italy was unattached; and while she was the least formidable of the six great powers, Bismarck saw that he could make good use of her for his own purposes. The adroitness by which he drew her into his net is in direct contrast to the bovine diplomacy by which Kaiser William II. and his subservient Chancellors have succeeded, during the past twenty years, in smashing all their alliances and in alienating the sympathy of the civilized world.
After the completion of Italian unity in 1870, the new Italian Kingdom found itself harassed not only by the many details of solidifying the civil Government, but also by the perplexities of international relations. The abolition of the Pope's temporal power made her, in theory at least, an object of odium to zealous Roman Catholics throughout the world. Her nearest neighbors—France and Austria—having long been the most loyal supporters of the head of the Roman Church, Italy could not be sure that either or both of them might not intrigue against her in behalf of the restoration of the Papacy. There was also in Italy a group of patriotic Jingoes—the Irredentists—bent on "redeeming" from Austria territory whose inhabitants they claimed were Italian in language, ideals, and situation. The Irredentist propaganda naturally increased the rancor which Austria felt toward the Italians over whom she had recently despotized.
When Crispi, who was passing from his earlier character of conspirator and Radical to that of constitutional statesman, made the tour of the European Chancelleries, in 1877, he found Bismarck profuse in his expression of good-will toward Italy. If we are to believe Crispi, the Chancellor was ready then to draw up a treaty with her, and went so far as to hint that he approved of Italy's aspirations. Among these were the possession of Tunis and a foothold on the east coast of the Adriatic. The next year, at the Berlin Congress, however, Italy's interests were ignored, and, instead, Austria was encouraged to extend her dominion south of the Balkans, and the French were at least not discouraged from coveting a stronger position in the Mediterranean.
Finally, in 1882, France seized Tunis, to the immense indignation of the Italians, who had come to regard that as their predestined province. For it lay only a few hours by steamer from the southern coast of Sicily; it commanded the passage between the western and eastern Mediterranean; and, above all, it was the symbol of Italy's colonial ambition. To have a colony, if not several, was then regarded as the sign of being a first-class power; and that Italy should be tricked out of Tunis seemed to advertise to the world that she was not a first-class power. For her protests availed nothing.
The Italians did not know then, nor for a long time afterward, that the French seizure of Tunis was directly due to Bismarck's instigation. Lord Salisbury, also, who seems to have been in the plot, approved it for his own reasons. Bismarck's motives were plain—he wished to entangle France further in African colonial ventures. It had taken forty years, many thousand soldiers' lives, and great expenditures for France to make Algiers reasonably safe. As Tunis would increase the French burdens, it followed that every regiment needed there would diminish the strength of the armies with which France guarded herself from a German attack on her eastern frontier.