 Complete the following phrase:  When the Siege of Mantua was briefly raised in early August 1796, Lauer supervised repairs to its fortifications. On 19 August, Emperor Francis II ordered Wurmser to make another attempt to relieve the town and named Lauer as his chief-of-staff. When drawing up the plan of attack, Lauer assumed that losses would prevent the French from quickly reacting to an Austrian offensive. This belief proved mistaken when Bonaparte hurled three divisions north into the upper Adige River valley. After overwhelming Paul Davidovichs covering force at the Battle of Rovereto, the French commander sent his troops marching east, then south down the Brenta River valley. Bonaparte crushed Wurmser at the 