Final answer:
The Ludlow miner strike was caused by adverse working conditions and labor disputes and is notably remembered for the Ludlow Massacre, where state troops attacked the miners' encampment. The strike failed with the intervention of federal troops arresting union leaders.
Step-by-step explanation:
The cause of the miner strike in Ludlow, Colorado, was primarily due to poor working conditions, low wages, and disputes over the right to unionize. Known as the Ludlow Massacre, this was the deadliest incident during an extended strike by coal miners, which turned violent when Colorado state troops fired on a miners' encampment. Although the strike, led by the United Mine Workers, was met with some initial solidarity, federal troops eventually arrived, arresting leaders of the movement and marking the strike as a failure.
The struggle did not end with the strike but continued as a fight for historical memory and the recognition of the importance of protecting workers' rights to organize.