Dataset is about Operation Chain Breaker (OCB) which is an initiative targeting Chinese pill press manufacturers and the Mexican Transnational Crime Organizations (TCOs) using pill press equipment to mass produce fentanyl pills being smuggled into the United States. OCB is one of three nationally branded DHS/HSI National Opioid Strategy Initiatives, which is focused on Chinese pill press supply chains; Mexican pill press brokers; Mexican TCOs using pill press equipment to mass produce fentanyl and fentanyl-related substances; domestic pill press equipment recipients engaged in fentanyl and fentanyl-related substance production; and money launderers facilitating the movement of fentanyl proceeds.