Military map of the routes used by R.S. Mackenzie and his troops, including New Mexico, Oklahoma, and Texas as well as parts of Louisiana, Arkansas, Missouri, Kansas, Colorado, and Mexico. The map shows routes, trails, railroads, roads, camps, old forts, other landmarks, battles with American Indians, and names and locations of American Indian tribes in Kansas, Oklahoma, and Texas. Scale [ca. 1:1,405,436] (23.76 miles to the inch).

Reproduction of a hand-drawn map showing the border area between Texas and Mexico from El Paso, Texas (left) to Van Horn, Texas (right). Several towns, forts, roads, and geographic features are marked primarily on the Texas side of the map. A note in the bottom-left corner of the map says "Where the Rio Grande becomes the U.S. & Mexico boundary, and flows towards the Big Bend District. It makes 1,260 miles of the international border. Much of the early history of the south-west was made along the Rio Bravo (Rio Grande) by the Spaniards. Their route was through "El Paso del Norte" the Pass of the North. This section of the border was very active during the "Border Trouble Days" of 1916 to 1920."