On March 8, 1942, the famous Tangcong Vaca Guerrilla Unit (TVGU) was organized in San Nicolas, Canaman with Juan Miranda as the Commanding Officer, Leon Aureus as the Executive Officer and Elias Madrid as the Finance Officer. Among the numerous Canamanons who joined-up soon afterwards either in the unit's intelligence or combat components were Jose and Antonio Madrid, Mamerto Sibulo, Andres Fortaleza, Marcos Severo, Damaso Avenilla, Federico Crescini, Nicolas Vargas, Venancio Begino, Eugenio Ragodon, Juan Pachica, Santiago Amaro, Jose Gervas, Pedro Angeles, Aproniano Lopez, Andres Alzate, Modesto Sanchez, Blas Alcantara, Andres Aguilar, Florencio Frondozo, Alfredo de la Torre and Flaviano Estrada.