They are not on strike: they've been locked out by Frick, because he wants to non-unionize the works.
"Prison Memoirs of an Anarchist"
Alexander Berkman
Why, man, all I said was that if the old spider kept making the men use that cheap powder that blows their eyes out and their hands off, and their legs off, they ought to unionize and strike.
"In the Heart of a Fool"
William Allen White
In their present stage it is quite difficult to unionize these establishments and they do cut prices for the proprietors of the steam laundries.
"The Trade Union Woman"
Alice Henry