> when did the US government try a "show of force" on its own soil only to be "reminded" that it was a bad idea?
https://www.theguardian.com/us-news/2016/nov/29/standing-roc...
https://www.theguardian.com/us-news/2016/nov/29/standing-roc...
I'll grant you that it's a protest, but most of the alleged violence described in that story seems to have been committed by the police. Peaceful protesters being beaten and mauled by attack dogs by definition don't count towards a valid argument for the effectiveness of the Second Amendment.
The protestors also lost - the pipeline was built, regardless.