The invading forces descend into chaos within minutes. The loss of chain of command, the inability to distinguish friend and foe, and a few inciting comments from the locals all combine to turn the disciplined army into an unruly mob. A very upset unruly mob, carrying a lot of sharp objects.
Some make their way forward to the front of the crowd, seeking to restore order, or exploit the herd mentality of the crowd, or perhaps simply escape the throng before they got stabbed somewhere important. Regardless of motivation, seventeen people find themselves the target of the majority of attention, faced with demands for a course of action and someone to blame.