 Complete the following phrase:  After fencing with the Viceroy near Soave and Monte Bastia at the Battle of Caldiero at the end of April, the archduke withdrew on 2 May. The retreat was ably covered by Feldmarschall-Leutt Johann Maria Philipp Frimonts rear guard. On 8 May, John defended a strong position behind the Piave River. In the 