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The Thirteenth Amendment (Amendment XIII) to the United States Constitution abolished slavery and invoulntary servitude except as punishment for crime. In Congress, it was passed by the Senate on April 8, 1864, and by the House on January 31, 1865. The amendment was ratified by the required number of states on December 6, 1865

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The United Textile Workers (UTW), which had 15,000 members in February 1933, grew to 250,000 members by June of 1934, about half cotton mill workers. Issues involved deplorable working conditions, low wages, and lack of union recognition

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The Haymarket affair (also known as the Haymarket massacreor Haymarket riot) was the aftermath of a bombing that took place at a labor demonstration on Tuesday May 4, 1886, at Haymarket Square in Chicago.

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The Pullman Strike was a nationwide railroad strike in the United States on May 11, 1894, and a turning point for US labor law. It pitted the American Railway Union(ARU) against the Pullman Company, the main railroads, and the federal government of the united states under President Grover Cleveland.

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The first Labor Day holiday was celebrated on Tuesday,September 5, 1882, in New York City, in accordance with the plans of the Central Labor Union.

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The steel strike of 1959 was a 116-day labor union strike (July 15 – November 7,1959) by members of the United Steelworkers of America (USWA) that idled thesteel industry throughout the United States. The strike remained the longest work stoppage in the American steel industry until the steel strike of 1986.

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The Labor Management Relations Act of 1947 is a United States federal law that restricts the activities and power of labor unions.

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In February 1935, Wagner introduced the National Labor Relations Act in the Senate. The Wagner Bill proposed to create a new independent agency—the National Labor Relations Board, made up of three members appointed by the President and confirmed by the Senate-to enforce employee rights rather than to mediate disputes.

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Knights of Labor (KOL), the first important national labour organization in the United States, founded in 1869

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The American Federation of Lobor was a national federation of labor unions in the United States founded in Columbus, Ohio, in December 1886 by an alliance of craft unions disaffected from the Knights of Labor