If there was one man throughout human history, you wanted in charge of "holding the line" it was none other than Svetozar Boroević. The man's abilities in defensive warfare were quite legendary among those historians who knew his name.
At least among those from the 21st century of Bruno's past life. And there was a reason for this. Currently, he was tasked with holding the line in the Alps, and that's exactly what he did. While Bruno had massacred Belgrade and dug in waiting for reinforcements to arrive, and for the enemy to attack in force.
Svetozar was high up in the alpine mountains, standing within his own fortifications as he gazed upon the Italian Army below, who was desperately trying for the third time this month to break through the defenses he had previously established in the region.