 Complete the following phrase:  In Austrias First Silesian War against Prussia, he was present at Chotusitz and Prague, and led the advanced guard of Khevenhüllers army in the victorious Danube campaign of 1743. Field Marshal Count Traun, who succeeded Khevenhüller in 1744, thought equally highly of Daun, and entrusted him with the rearguard of the Austrian army when it escaped from the French to attack Frederick the Great. He held important commands in the battles of 