 Complete the following phrase:  Davout. Leading Prince Friedrich Hohenzollerns advance guard at the Battle of Teugen-Hausen on 19 April 1809, he drove the French advance elements out of Hausen and occupied a commanding ridge. When Marshal Louis Davout attacked, he conducted a stout defense with his troops and the reinforcements that arrived. He was wounded in the action, but continued to lead his troops in a battle notable for an unusual degree of front-line leadership by Austrian generals. On 21 April, his troops fought a rear guard action against Bavarian troops. His command formed the extreme left flank of the main body as Charles prepared to crush Davout on the morning of 22 April. His dispatch brought the first word to Charles that Napoleon was about to descend on the Austrian left flank. In the 