Increasing tensions between the United States and Mexico over their shared border culminates in war! The Treaty of Guadalupe Hidalgo establishes the border at the Rio Grande and Mexico cedes 55% of its northern territory, continuing the United States’ expansion westward. Read more about it!
The information in this guide focuses on primary source materials found in the digitized historic newspapers from the digital collection Chronicling America.
The timeline below highlights important dates related to this topic and a section of this guide provides some suggested search strategies for further research in the collection.
|February 1836||Texas gains independence from Mexico.|
|December 29, 1845||Texas becomes the 28th state in the Union.|
|May 11, 1846||Disputing between US and Mexico over location of Texas border.|
|May 12, 1846||Ongoing aggression between US and Mexico.|
|May 15, 1846||The United States declares war on Mexico.|
|April 3, 1847||General Scott lands at Veracruz.|
|April 8, 1847||US troops under General Taylor win the Battle of Buena Vista.|
|February 2, 1848||Nicholas Trist and Mexican officials sign Treaty of Guadalupe Hidalgo.|
|March 10, 1848||Congress ratifies the Treaty of Guadalupe Hidalgo.|
|July 15, 1848||President Polk announces end of war to Congress.|