Labor unions are a group of people who represent workers in different occupations, and work to protect the rights of the workers, such as working conditions, and wages.
When workers at a local business were maltreated by their managers, they went to their labor union for help, who suggested for them to go on strike.
The labor union was organized in order to represent the thousands of men and women working as longshoremen without any legal representation in New Jersey in the 1960's.