The Vietnamese continued to use non-violent civil disobedience even in the years of massive armed conflict.
The Czar was overthrown, essentially, by a peaceful demonstration.
The Ussr was similarly overthrown by a peaceful demonstration.
Under almost ALL conditions the essential revolutionary act is non-violent civil disobedience.
I am definitely NOT a pacifist. To use Orwell's language (which he said assistant professors such as I were afraid to use) , sometimes you can achieve good results by killing people.
But non-violent civil disobedience remains the primary tactic.
Carrol