A US union is a private association or club with internal rules. It is granted the legal right to attempt to "organize" a subset of workers at an employer, by asking them to join voluntarily. US law prohibits some workers from being a union member, so those NOT excluded at one workplace are called the bargaining unit. If 1/3 of the unit asks for a secret ballot election, the federal government oversees it after a campaign between the union and the employer.
If 50% +1 of those who VOTE on ballot day vote for Union X, then everyone in the bargaining unit is in the union, and bargaining a contract begins.
National labor union
independent workers' labor union
William H. Sylvis was the leader of the National Labor Union.
the knights of labor
National Labor Union (NLU)
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The first labor union was the National Labor Union. It was organized in 1866. Another early labor union was the Knights of Labor. This union was secret society when it first began in 1869. The American Federation of Labor was an early labor union that was led by Samuel Gompers and was established in 1886.
In our factory, the employees belong to a labor union.
National labor union
American Labor Union was created in 1902.
National Labor Union was created in 1866.
International Labor Union was created in 1878.
International Labor Union ended in 1887.
independent workers' labor union
National Labor Union (1866)
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Union Labor Party - California - was created in 1901.