The rising in northern Italy, on the contrary, was directed to that particular end. Immediately on the news of Metternich's fall the Milanese expelled the Austrian troops from their city, and soon Austria had evacuated a great part of Lombardy. The Venetians followed the lead of Milan and set up a republic once more. The Milanese, anticipating a struggle, appealed to Charles Albert, King of Sardinia, for aid. By this time a great part of Italy was in revolt. Constitutions were granted to Naples, Rome, Tuscany, and Piedmont by their rulers. The king of Sardinia was forced by public opinion to assume the leadership in the attempt to expel the interloping Austria and ultimately, perhaps, to found some sort of an Italian union which should satisfy the longings for national unity. The pope and even the Bourbon king of Naples were induced to consent to the arming and dispatch of troops in the cause of Italian freedom, and Italy began its first war for independence.

The liberal movement in Germany in 1848.

The crisis at home and the Italian war made it impossible for Austria to prevent the progress of revolution in Germany. So spontaneous was the movement, that before the fall of Metternich reform movements had begun in Baden, Würtemberg, Bavaria, and Saxony. The opportunity seemed to have come, now that Austria was hopelessly embarrassed, to reorganize the German Confederation.

Frederick William IV (1840–1861) of Prussia takes the lead in the reform movement in Germany.

The king of Prussia, seeing his opportunity, suddenly reversed his policy of obedience to the dictates of Austria, and determined to take the lead in Germany. He agreed to summon an assembly to draw up a constitution for Prussia. Moreover, a great national assembly was convoked at Frankfurt to draft a constitution for Germany at large.

265. By the end of March, 1848, the prospects of reform were bright indeed. Hungary and Bohemia had been guaranteed constitutional independence; the Austrian provinces awaited their promised constitution; Lombardy and Venetia had declared their independence of Austria; four Italian states had obtained their longed-for constitutions, and all were ready for a war with Austria; Prussia was promised a constitution, and lastly, the National Assembly at Frankfurt was about to prepare a constitution for a united Germany.

Conservatives and radicals both help to frustrate the realization of the proposed reforms.

The moderate reformers who had gained these seeming victories had, however, only just reached the most difficult part of their task. They had two kinds of enemies, who abhorred each other but who effectually combined to undo the work of the moderates. These were, first, the conservative party, represented by Austria and the Italian rulers who had been forced most reluctantly to grant constitutions to their subjects; and, secondly, the radicals, who were not satisfied with the prospect of a liberal monarchy and desired a republican or socialistic form of government. While the princes were recovering from the astonishing humiliations of March, the radicals began to discredit the revolutionary movement and alienate public opinion by fantastic programmes and the murder of hostile ministers.

Defeat of the Italians under Charles Albert of Sardinia, July, 1848.

For the moment Austria's chief danger lay in Italy, which was the only one of her dependencies that had actually taken up arms against her. The Italians had been unable to drive out the Austrian army, which, under the indomitable general, Radetzky, had taken refuge in the so-called Quadrilateral, in the neighborhood of Mantua, where it was protected by four great fortresses. Charles Albert of Sardinia found himself, with the exception of a few volunteers, almost unsupported by the other Italian states. The best ally of Austria was the absence of united action upon the part of the Italians, and the jealousy and indifference that they showed as soon as war had actually begun. The pope decided that his mission was one of peace and that he could not afford to join in a war against Austria, the stoutest ally of the Roman church. The king of Naples easily found a pretext for recalling the troops that public opinion had compelled him to send to the aid of the king of Sardinia. Charles Albert was defeated at Custozza, July 25, and compelled to sign a truce with Austria and withdraw his forces from Lombardy.