I can see the merit of your argument.
People on the Italian mainland always seem to have been prone to deception and back-stabbing, it seems...Prime literary examples, #ColleenMcCullough's #Cesar saga and #ThePrince by #Macchiavelli (not to mention the #Borghias, for that matter.)
I'd still argue that THEM not knowing what was about to happen, did not make it "sudden." It needn't have been. They were apparently in ignorance of many martial principles,...
