Conversation so far:
What was the strike of 1913-14?
The strike, called in September 1913 by the United Mine Workers, over the issue of union representation, was against coal mine operators in.
What was the result?
The strike was fought vigorously by the coal mine operators association and its steering committee, which included Welborn, president of CF&I.
What was the Ludlow Massacre?
The camp was burned, resulting in 15 women and children, who hid in tents at the camp, being burned to death.

Question: Why did this happen?
Self-contained rewrite: Why did the Ludlow Massacre happen?