The Strengths and Weaknesses of an Organized Armed Response

In 18 74, there was a group called the seattle amateur rifle association. They leased land for a range on current present day capital hill iike,. right where th the train station is. Later on, in 18 86, they decided to run every person who looked chinese out of town - known as the tacoma method. The question doctors trying to summarize comes what the strength or weaknesses of having an organized armed response are?