By then, John D. Rockefeller was employing phalanxes of lawyers, bodyguards, and bureaucrats to protect him from those trying to beg or claim his money. In the spring of 1914, the “Ludlow massacre” secured his reputation as a principal villain in the history of labor unions, when Colorado militiamen attacked and burned a tent city of workers on strike against Rockefeller mining interests, killing six men by gunfire and thirteen women and children in the flames.