What was the first ameriacan union to unite unskilled workers and skilled workers?

The first American union to unite unskilled and skilled workers was the Knights of Labor, founded in 1869. Under the leadership of Terence V. Powderly, the Knights aimed to bring together workers from various trades and skill levels to advocate for better working conditions, fair wages, and shorter hours. This inclusive approach marked a significant shift in labor organizing during the late 19th century.