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Surveying the Mexican Border

The Treaty of Guadalupe Hidalgo, approved for ratification by the U.S. Senate in 1848, set the terms for ending the Mexican War. Mexico agreed to cede more than half its territory to the United States for $15 million. A new, 2,000-mile border between the two countries was to run along the Rio Grande and Rio Gila to the Pacific Ocean with a boundary commission from each country surveying and marking its location. Congress authorized the Army Corps of Topographical Engineers to conduct the survey for the United States.

1 Image Boundary between the United States and Mexico, map by William H.... View All Images
1 Image Oenothera primiveris, Evening Primrose Family, Herbarium specimen... View All Images
1 Image Oenothera primiveris, photograph by Warren L. Wagner View All Images
1 Image Canis latrans texensis, coyote skull specimen, Texas, Frontera, from... View All Images