Violence-Born Independence Day

My latest column is sure to ruffle some feathers. It begins:
As a voluntaryist, my primary modus operandi, even in the case of self-defense, is nonviolence. As such, I have a hard time finding justification for the violence of others, now and in the past. In a few days, the United States will be celebrating it's independence from Great Britain, which occurred in 1776, followed by eight years of violent warfare. That Great Britain used violence to govern the American colonies is indisputable, as all states govern with violence, but was the violence-based revolution by the colonists justified on libertarian grounds?