(NB: I was originally discussing anger, as distinct from violence, but as long as we're here...)

The most famous example of non violence is the Independence of India. If I squint, I guess I can see the nascent US as having provided the credible threat in that case, but there was still a decade to go between independence and suez.

Edit: modulo a few exceptions, the fall of the Soviet Union was also a stunning success for non violence, and one where the credible threat wasn't explicitly invoked and isn't immediately clear. (as far as I can tell a generation came into power who decided "you know, how the System works and how we were told it worked when we were Young Pioneers have significant differences; why should we keep doing this?" and the rest is history)

India gained its independence because the violence exerted by the Nazis and the Japanese empire exhausted the UK so much they saw no way to keep hold of India by force.

And one million people died in the subsequent partition.

There was a huge credible threat of violence in the independence movement of India