<P> Unions began forming in the mid-19th century in response to the social and economic impact of the industrial revolution . National labor unions began to form in the post-Civil War Era . The Knights of Labor emerged as a major force in the late 1880s , but it collapsed because of poor organization , lack of effective leadership , disagreement over goals , and strong opposition from employers and government forces . </P>
<P> Unions began forming in the mid-19th century in response to the social and economic impact of the industrial revolution . National labor unions began to form in the post-Civil War Era . The Knights of Labor emerged as a major force in the late 1880s , but it collapsed because of poor organization , lack of effective leadership , disagreement over goals , and strong opposition from employers and government forces . </P>
when did unions start in the united states
when did unions start in the united states
mid-19th century
mid-19th century