knights of labor: The Knights of Labor, officially Noble and Holy Order of the Knights of Labor, was the largest and one of the most important American labor organizations of the 1880s. Its most important leader was Terence V. Powderly.
Tolpuddle Martyrs ----- In 1834, farm workers in west Dorset formed a trade union. Unions were lawful and growing fast but six leaders of the union were arrested and sentenced to seven years’ transportation for taking an oath of secrecy. A massive protest swept across the country. Thousands of people marched through London and many more organised petitions and protest meetings to demand their freedom.
Labor Strike: This is definitely a challenge. Especially for the businesses, when one unhappy person could cause a commotion and lead to a labor strike. This could hurt the company by losing profits, and a company know that everyone wont always be happy.