Final answer:
The Battle of Blair Mountain was one of the largest armed labor uprisings in the U.S., with fifteen thousand miners clashing with federal troops in 1921 over unionization efforts, ending in the miners' surrender.
Step-by-step explanation:
The Battle of Blair Mountain
The question refers to the historical event known as the Battle of Blair Mountain, which took place in August 1921. This was one of the largest armed uprisings in American labor history, where as many as fifteen thousand miners marched to southern West Virginia. Their aim was to rescue fellow miners who had been jailed for attempting to form labor unions. The conflict escalated, leading to a fierce exchange with an estimated million rounds fired. Federal troops, along with a bomber squadron, were eventually deployed against the miners, culminating in the miners' surrender. Union leaders were arrested, and mine owners leveraged the fear generated by the Red Scare to denounce union activism as 'un-American.' This pivotal event highlighted the intense struggle for labor rights and unionization in the United States.