Which armed mine group was known for violently attacking company men?

The group known for violently attacking company men is correctly identified as the Dirty Dozen. This group, which was composed mostly of miners, gained notoriety for their aggressive tactics against coal company representatives, especially during labor disputes in the early 20th century. These actions were often a response to the harsh working conditions, low wages, and lack of rights that miners faced at the time.

The term "Dirty Dozen" is historically associated with a number of labor-related incidents and provides a vivid example of the tensions between labor and management during that era. The group's reputation for violence not only highlighted the desperation of the miners but also underscored the lengths to which they would go to fight for their rights and improve their working conditions.

Each of the other choices refers to different groups or historical contexts that do not specifically align with the violent tactics employed against company men as seen with the Dirty Dozen. This distinction helps further clarify why the choice made is accurate in this context.