This is a gross misrepresentation of the history of capitalism. In the western world, calling on the army to stop a workers uprising was a common feat up to WWII and some variation of that still occurs frequently in France via the gendarmerie (admittedly with "less-lethal" weaponry).
The most famous example of that in the USA is certainly the battle of Blair Mountain. [0] The Chicago haymarket affair, while not about soldiers shooting workers, did result in innocent men condemned to death sentence. [1] There's likely more but i wouldn't know.
I'm from France, and there's a lot of it over here too. The democratic Paris Commune was overthrown by the military, killing tens of thousands of civilians. [2] The strikes of Fourmies [3] and Draveil [4] were also literally shot down.
We could also name the Vital Michalon or Rémi Fraisse killed by law enforcement (specifically grenades) for their political activities, or the revolutionaries sitting in jail long after their sentences ended (Action Directe, George Abdallah). And of course the countless "ordinary" murders by law enforcement in popular districts, and the incredible massacres perpetuated both by police/military and fascist militias in the context of colonization/decolonization such as the Setif massacre [5] where the Algerians celebrating the end of WWII and the defeat of nazism were shot and many thousands were killed.
Of course, to be fair, such massacres are a common feature of repressive regimes all around the world... and leninist regimes as well, such as during the Kronstadt Commune [6] or the Makhnovshchina in Ukraine. [7] But as any clearheaded thinker will tell you, most so-called "communist" regimes had nothing to do with communism and everything to do with State capitalism [8], which explains the many similarities.
Still, despite my criticism of their regime, you could be surprised to see how trade unions fare in Cuba, what the working conditions are like there, and that they have one of the best healthcare systems around the planet.
I almost forgot a more recent and shocking example well after WWII. The general strike of October 17th 1961 [0] called upon by the Algerian FLN as a demonstration for independence... Dozens of thousands joined, and hundreds were drowned by the police and thousands detained (then deported) in the same locations that the nazi regime used (mostly stadiums). All this under the orders of Maurice Papon [1], who was a higher-up nazi collaborator in the police during WWII.
Please keep such examples (merely isolated anecdotes in a sea of troubling events) in mind when considering there's aspects of history we are not taught in schools and in mass media. If you're from the USA, i heard good things about Howard Zinn's A People's History of the United States [2]
This is either profoundly ignorant or you are trying paper over the violent history of anti-worker action with weaselly over-specificity.
> the United States has had the bloodiest and most violent labor history of any industrial nation in the world:
https://en.wikipedia.org/wiki/List_of_worker_deaths_in_Unite...