 Complete the following phrase:  On 12 February 1793, Klenau received his promotion to lieutet colonel in a Lancer regiment, and joined the Austrian force in the Rhineland, serving under General of Cavalry Count Dagobert Sigmund von Wurmser. He was captured later in the spring near the town of Offenbach, but was freed unexpectedly by two Austrian Hussars from the 17th Regiment Archduke Alexander Leopold, who came upon him and his captors. At the first 