[Sidenote: Austrians driven northward] [Sidenote: Radetzky seeks refuge] All Italy now, from the southern shores of Sicily to the Alps, was in a blaze of insurrection. Venice, Piedmont and Lombardy were in arms. Charles Albert, the King of Sardinia, put himself at the head of the movement in northern Italy. From all parts of Italy volunteers crowded to his banners. In defiance of the Pope's orders a compact body of these volunteers marched from Rome. Radetzky, the Austrian commander, a veteran of all the Austrian wars since the outbreak of the French Revolution, had long prepared for this struggle by formidable fortifications at Verona. When Milan revolted and the Austrian Vice-Governor, O'Donnell, was captured, Radetzky evacuated the city at the approach of Charles Albert's army from Piedmont. His outlying garrison was cut off by the Italians. Preferring the loss of Milan to a possible annihilation of the army, Radetzky fell back upon Verona. On the banks of the Adige, about twenty-five miles east of the Mincio, he rapidly concentrated all available forces, while the Italians threw up intrenchments on the Mincio. There, with the armies of Piedmont and Lombardy in front of him and the revolutionary forces of Venice behind him, Radetzky stubbornly held his ground. Nothing remained to Austria on Italian ground but Verona and the neighboring fortresses on the Adige and Mincio. [Sidenote: Kossuth's appeal] [Sidenote: Magyar Constitution proclaimed] [Sidenote: Stocks fall in Vienna]