The Battle of Ratisbon, also called the Battle of Regensburg, of the Napoleonic Wars was fought on the 23 April 1809 between the army of the First French Empire, led by Napoleon I, and that of the Austrian Empire, led by Archduke Charles. Scene of the last engagement of the Bavaria phase of the campaign of 1809, the brief defense of the city and installation of a pontoon bridge to the east enabled the retreating Austrian army to escape into Bohemia. During the assault, Marshal Jean Lannes led his troops up ladders onto the walls, and Napoleon was wounded in his ankle by a small artillery round. The shot had been fired at great distance and did not severely hurt the Emperor, but caused a contusion.