From the outset, the greater portion of the population remained concentrated in what was to be formally designated in 1596 as the city of Monterrey. However, arrival of settlers from all over Spain were present in upcoming years. As the case of Bernabé de las Casas, a Spanish-Canarian explorer from Tenerife, Canary Islands, Spain, who after his victorious expedition with Juan de Oñate and fighting against Acoma Indians in New Mexico, came to the region with Spanish and Canarians families to found several settlements and mining camps in a then unsettled region of the New Kingdom of León, later known as Valle de las Salinas (Salinas Valley), in the subsequent years many villages were founded by his descendants, and the Salinas Valley was declared an 'alcaldía mayor'.