The Provincias Internas, also known as the Comandancia y Capitanía General de las Provincias Internas, was an administrative district of the Spanish Empire created in 1776 to provide more autonomy for the frontier provinces of the Viceroyalty of New Spain, present-day northern Mexico and the Southwestern United States. The goal of its creation was to establish a unified government in political, military and fiscal affairs. Nevertheless, the Commandancy General experienced significant changes in its administration because of experimentation to find the best government for the frontier region as well as bureaucratic in-fighting. Its creation was part of the Bourbon Reforms and was part of an effort to invigorate economic and population growth in the region to stave off encroachment on the region by foreign powers. During its existence, the Commandancy General encompassed the provinces of Nueva Navarre, Nueva Vizcaya, Las Californias, Nuevo México, Nuevo Santander, Nuevo Reyno de León, Coahuila and Texas.

New Spain, officially the Viceroyalty of New Spain, originally the Kingdom of New Spain, was an integral territorial entity of the Spanish Empire, established by Habsburg Spain. It was one of several domains established during the Spanish conquest of the Americas, and had its capital in Mexico City. Its jurisdiction comprised a large area of the southern and western portions of North America, mainly what is now Mexico and the Southwestern United States, but also California, Florida and Louisiana; Central America, the Caribbean, and northern parts of South America; several Pacific archipelagos, most notably the Philippines and Guam. Additional Asian colonies included "Spanish Formosa", on the island now known as Taiwan.