In France the decided, if not expressed, wish of the Emperor Napoleon, and in Austria the patriotic indignation and warlike excitement of the court and army, must necessarily have brought on a rupture; and the most trifling pretext was enough to cause the explosion. The arrest of a French courier by the Austrians at Braunau, the violation of the imperial territory by the troops of Marshal Davout then posted at Wurzburg, provoked hostilities several days sooner than Napoleon expected; and Metternich had already asked for his passports when, on the 10th April, the Archduke Charles crossed the Inn with his army. The Tyrol at the same time rose in insurrection under the orders of a mountain innkeeper, Andrew Hofer; and the Bavarian garrisons were everywhere attacked by hunters and peasants. Like the Spanish, the Tyrolese claimed the independence of their country. The troops of the Emperor Napoleon already covered Germany; Davout being at Ratisbon, Lannes at Augsburg, and Masséna at Ulm. Marshal Lefebvre commanded the Bavarians, Augereau was appointed to lead the Wurtembergers, the men of Baden and Hesse; the Saxons were placed under the orders of Bernadotte. On the evening of the 9th April, the Archduke Charles wrote to the King of Bavaria that his orders were to advance, and treat as enemies all the forces which opposed him; that he fondly trusted that no German would resist the liberating army on its march to deliver Germany. The Emperor Napoleon had already offered to the Kings of Saxony and Bavaria one of his palaces in France as an asylum, should they find themselves compelled to temporarily abandon their capitals. The King of Bavaria set out for Augsburg. The unexpected movement of his enemies modified Napoleon's plan of attack. A delay in the arrival of the despatches sent to Major-General Berthier caused some difficulty in the first operations of the French army. When the emperor arrived at Donauwerth, on the morning of the 17th, his army was spread over an extent of twenty-five leagues, and was in danger of being cut in two by the Archduke Charles. It was Napoleon's care and study on beginning the campaign to avoid this danger, which soon afterwards he subjected his adversary to. The Austrians, after passing the Isar at two places, and driving back the Bavarians who had been appointed to defend the passage, advanced towards the Danube.