 Complete the following phrase:  When the Austro-Hungarian offensive routed the Italians, the new Italian chief of staff, Armando Diaz ordered to stop their retreat and defend the fortified defenses around the Monte Grappa summit between the Roncone and the Tomatico mountains; although numerically inferior 51,000 against 120,000 the Italian Army managed to halt the Austro-Hungarian and German armies in the 