On 29 January 1686, captain Melchor Rodríguez Mazariegos, under orders of the governor, left Huehuetenango for San Mateo Ixtatán, where he recruited indigenous warriors from the nearby villages, with 61 from San Mateo itself. It was believed by the Spanish colonial authorities that the inhabitants of San Mateo Ixtatán were friendly towards the still unconquered and fiercely hostile inhabitants of the Lacandon region, which included parts of what is now the Mexican state of Chiapas and the western part of the Petén Basin. In order to prevent news of the Spanish advance reaching the inhabitants of the Lacandon area, the governor ordered the capture of three community leaders of San Mateo, named as Cristóbal Domingo, Alonso Delgado and Gaspar Jorge, and had them sent under guard to be imprisoned in Huehuetenango. The governor himself arrived in San Mateo Ixtatán on 3 February, where captain Melchor Rodríguez Mazariegos was already awaiting him. The governor ordered the captain to remain in the village to use it as a base of operations for penetrating the Lacandon region. The Spanish missionaries Fray Diego de Rivas and Fray Pedro de la Concepción also remained in the town. After this, governor Enrique Enriquez de Guzmán left San Mateo Ixtatán for Comitán in Chiapas, to enter the Lacandon region via Ocosingo.