The phrase "army of labor" is correct and usable in written English.
It can be used to refer to a large group of workers or laborers, often in a context discussing workforce or labor movements.
Example: "The industrial revolution saw the rise of an army of labor, transforming the economy and society."
Alternatives: "workforce" or "labor force".
As for Labor, it's likely it'll see a sudden surge in recently "passive" members turning up at its next local Labor meeting to start door-stopping and canvassing; with more than 500,000 members, it has a serious reserve army of labor to exploit over the next few weeks.
In the classical terminology of Marx, a large reserve army of labor reduces both the individual and the collective bargaining power of workers, enabling capital to take a bigger piece of the economic pie.
Leaders of the Workingmen's Party — which was heavily influenced by Marxism and was a forerunner of the Socialist Party — addressed a crowd of 30,000 people in downtown Chicago to form a "Grand Army of Labor," Dray writes.
Think of them as a full division in "the reserve army of labor".
We don't, for instance, even use that phrase "the reserve army of labor" anymore.
The All-Involuntary Army (of Labor) As has always been true, the coexistence of idling workplaces and cast-off workers remains the single most severe indictment of capitalism as a system for the reproduction of human society.
"He also had the army of organized labor, the muscle of the Democratic Party.
Second, competition from this reserve army of surplus labor keeps wages low even as the economy grows richer.
To the west, Mr. Critz — with an army of organized labor supporters behind him — ran hard on union themes against outsourcing of jobs and international competition.
Tuition was nearly free, in part because of support from church members and dioceses, but also because of an army of cheap labor: There were sufficient nuns and priests to run the schools, with nearly everyone from the principal on down living under a vow of poverty.
But as he surveyed the field in the numbing chill of this overcast morning two days before Christmas, Reeves could see nothing on the gridiron but thousands of bales of straw, and a small army of men laboring to move them.
