 Complete the following phrase:  Meanwhile, a revived Austria was preparing to strike. The war hawks at the court of Emperor Francis I convinced him to take full advantage of Frances preoccupation with Spain. In April 1809 the Austrians opened the campaign without a formal declaration of war and caught the French by surprise. They were too slow to exploit their gains, however, and Napoleons arrival from Paris finally stabilized the situation. The Austrians were defeated at the Battle of Eckmühl, fled over the Danube, and lost the fortress of Ratisbon, but they still remained a cohesive, fighting force, which meant further campaigning was required to settle the issue. The French captured Vienna and attempted to cross the Danube via Lobau island southeast of the Austrian capital, but they lost the subsequent 