What Makes Cremona So Terrifying?

Tacitus wrote about the destruction of tremona, a roman city. And he says, forty thousand armed men forced their way into the city. Neither rank nor years saved the victims from an indiscriminate orgy in rape alternated with murder and murder with rape. Gray beards and frail old women who had no value as loot were dragged off to raise a laugh. A single looter trailing a horde of money or temple offerings of massive gold, was often cut to pieces by others who weres onger. There was a diversity of wild desires, differing conceptions of what was lawful, and nothing barred. Cremona lasted them four days.