Complex sentence: He distinguished himself by his valour in the Seven Years' War, notably at Breslau, Leuthen, Hochkirch and Maxen, and after the war rose rapidly to the rank of lieutenant field marshal.
Split into simpler sentences: He distinguished himself by his valor in the Seven Years' War, notably at Breslau, Leuthen, Hochkirch and Maxen. After the war, he rose rapidly to the rank of lieutenant field marshal.