There seemed nothing to hinder Bismarck from overthrowing and dismembering the Austrian empire, as Napoleon had done more than once, but there is reason to believe that the dread of France coming to the aid of the defeated realm made him stop short in his career of victory. Napoleon III. boasted to the French Chambers that he had stayed the conqueror at the gates of Vienna. However that be, a treaty of peace was signed, in which Austria consented to withdraw from the German Confederation. Bismarck had gained one great point in his plans, in removing a formidable rival from his path. The way was cleared for making Prussia the supreme power in Germany. The German allies of Austria suffered severely for their assistance to that power. Saxony kept its king, but fell under Prussian control; and Hanover, Hesse-Cassel, Nassau, and the free city of Frankfurt-on-the-Main were absorbed by Prussia. [=South German States in the War=] The States of South Germany had taken part on the side of Austria in the war, and continued the struggle after peace had been made between the main contestants. The result was the only one that could have been expected under the circumstances. Though the Bavarians and Würtembergers showed great bravery in the several conflicts, the Prussians were steadily successful, and the South German army was finally obliged to retire beyond the Main, while Würzburg was captured by the Prussians. In this city a truce was effected which ultimately led to a treaty of peace. Würtemberg, Bavaria, and Baden were each required to pay a war indemnity, and a secret measure of the treaty was an offensive and defensive alliance with Prussia for common action in case of a foreign war. [=Disunion of Germany=] Mention was made in the last chapter of the long disunion of Italy, its division into a number of separate and frequently hostile states from the fall of the Roman Empire until its final unification in 1870. A similar condition had for ages existed in Germany. The so-called German Empire of the mediæval period was little more than a league of separate states, each with its own monarch and distinct government. And the authority of the emperor decreased with time until it became but a shadow. It vanished in 1804, leaving Germany composed of several hundred independent states, small and large. Several efforts were made in the succeeding years to restore the bond of union between these states. Under the influence of Napoleon they were organized into South German and North German Confederacies, and the effect of his interference with their internal affairs was such that they became greatly reduced in number, many of the minor states being swallowed up by their more powerful neighbors. [=Efforts at Union=]