What were some of the names of the first unions?

Some of the first unions in the United States included the National Labor Union (NLU) founded in 1866, the Knights of Labor established in 1869, and the American Federation of Labor (AFL) formed in 1886. These unions aimed to improve working conditions, secure better wages, and advocate for workers' rights. They played pivotal roles in the labor movement, laying the groundwork for future labor organizations.