Tren de Aragua is the largest criminal organization in Venezuela, with over 5,000 members. Tren de Aragua is led by Héctor Rusthenford Guerrero Flores, alias "Niño Guerrero"; he was incarcerated in Tocorón prison, which functioned as the organization's de facto headquarters. The gang has since expanded throughout Latin America and the United States amidst the Venezuelan refugee crisis, with the growth of the gang following the migration of Venezuelans to host nations. Due to the severity of its crimes, combatting the gang has become a priority to many nations where Tren de Aragua has entered.