 Complete the following phrase:  In 1799 Chasteler was appointed Generalquartiermeister chief of staff to Suvorov and commander of a wing of the Austrian army in Italy. Serving at the Battle of Cassano 27 April, he invested Tortona in May, but was wounded at Alessandria, 16 July. Elevated to Commander of the Order of Maria Theresa and made chief of staff in Southern Germany in 1800, he serving at 