The establishment of Spanish settlements in Northern Nuevo León, was often slowed down by attacks of Native Americans, of Coahuiltecan origin such as Alazapas, Cuanales, and Gualeguas, among others. The attacks were prompted by, or in response to, Spanish slave raids on the Indians. Spanish Captain Alonso de León wrote a description of many assaults and atrocities against the Spaniards in the New Kingdom of León, he also stated that the indigenous population of the New Kingdom of León, was different in all aspects from that of other provinces of New Spain.