mar 15, 1842 - Commonwealth vs. Hunt decided by The Massachusetts Supreme Court in the "March term" of 1842 (so our assigning this to the 15th is a convenience, not reflecting any precise historical record). The Court holds that labor unions were not criminal conspiracies subject to prosecution. Unions are legal and have a right to strike. Regarded as a landmark of labor law but the decision did not completely end the chance of criminal charges on the grounds that striking was unlawful