By this time the same storm of revolution was sweeping over Germany. Popular demonstrations occurred at Mannheim, Cassel, Breslau, Koenigsberg and along the Rhine region in Cologne, Duesseldorf and Aix-la-Chapelle. A popular convention at Heidelberg, on March 5, had resolved upon a national assembly to be held at Frankfort-on-the-Main by the end of March. Elections for this assembly were being held throughout Germany. The long-desired union of Germany was at last to be accomplished. On March 14, King Frederick William of Prussia convoked the Prussian Assembly for April 27, to deliberate upon Prussia's part in the proposed German union. Then came the news of the events in Vienna. Crowds gathered in the streets excitedly discussing the events of the day. Attempts on the part of the police to disperse them led to threatening encounters. Under the stress of alarming bulletins from Vienna, the King issued a rescript on March 18, in which he not only convoked the Prussian Assembly for the earlier date of April 2, but himself proposed such reforms as constitutional government, liberty of speech, liberty of the press, and the reconstitution of the Germanic Federation as a national union of states--a realization in brief of all the most ardent ideals of the German Liberals. Now the popular agitators proposed a monster demonstration to thank the King for his concessions. Shortly after noon, on March 18, the processions converged upon the palace. Immense crowds filled the streets. The appearance of the King upon the balcony was greeted with cheers. King Frederick William tried to speak but could not make himself heard. The troops set out to clear the palace grounds. Angry shouts arose for the withdrawal of the soldiery. In the confusion two shots were fired. A panic ensued: "We are betrayed," cried the leaders, and called the people to arms. The troops of the garrison charged into the rioters. Barricades were thrown up, and here and there church bells rang the tocsin. From three in the afternoon until early the next morning, fighting continued in the streets. The entire garrison of Berlin was called out and with the help of the bright moonlight succeeded in clearing one street after another. Prince William, the future German Emperor, gained unenviable notoriety by his zeal. At two in the morning the King gave orders to stop firing. He issued a proclamation: "To my dear people of Berlin," the mild tone of which only betrayed his weakness. On the following day all the troops were withdrawn and ordered out of the city. Prince William likewise left Berlin in deep chagrin and departed for England. His palace had to be protected from the fury of the people by placards pronouncing it the property of the nation. Once more the rioters appeared before the royal palace with the bodies of some of their slain. The King convoked a new Ministry and consented to substitute armed citizens and students for his royal guards. A general amnesty was proclaimed. On