Board Thread:Skyrim/@comment-10133254-20130530100553/@comment-6881629-20130530113819

Raven Giordano wrote: About that attack...Did the Silver Hand just walk into Whiterun? "That's some fine scale armor you got there. Shiny." I think the guards are just idiots.

I would imagine they entered the city slowly one at a time stayed low until they were all in then regrouped to attack (or they used console commands to tp in).