We also had the ludlow massacre where the local militia and mine company guards attacked the miners with machine guns (pre nfa...) and dynamite https://en.m.wikipedia.org/wiki/Ludlow_Massacre.
It's important to remember that the strikers started the violence:
>>When leasing the sites, the union had selected locations near the mouths of canyons that led to the coal camps in order to block any strikebreakers' traffic.
Blocking strikebreaker traffic amounts to using violence to obstruct others' freedom of movement.
Strikebreakers were often assaulted and sometimes murdered.
The fundamentally coercive nature of historical striking activity is heavily glossed over, and modern day anti-free-market ideologues go to extreme lengths to try to justify it.
