Border Disputes and the Settlement of Texas

Getting Started

Begin your research by brainstorming keywords - the words and phrases you’ll use to search for books, articles, websites, government documents, and other resources. These may include names of people and places or historical concepts like eras and movements. A librarian can suggest “subject headings” to find the most relevant resources.

Example Keywords & Catalog Subject Headings

International relations
19th century U.S.
U.S. History
Regional and area studies
Military history and wars
Compromise of 1850

Genealogy, African American and Western History Resources

The Western History & Genealogy department focuses on Colorado and the West. These materials do not check out and are available at the Central Library when we are open. Western History and Genealogy Staff are also available to assist by phone and email and can provide scans of collection items for your project. Email and include "National History Day" in your subject line, or call 720-865-1821, Sunday-Thursday, 1-5 p.m. 

The Blair Caldwell African American Research Library archives and reference collections focus on African American history and culture in Colorado and the West. Materials from the archives do not check out and are available to view on Level 2 of the library. Blair-Caldwell Library staff are available to assist you by phone and email. We can also provide scans of collection items for your project. Email and include "National History Day" in your subject line, or call 720-865-2401, Tuesday-Friday, 10 a.m.-6 p.m. or Saturday, 10 a.m.-5 p.m.

Database/Online Resources

Library databases are online collections of information, organized for research. Databases contain articles, eBooks, images, maps, primary sources and more. If you don’t have a library card, register online for immediate access to these resources. The following recommended databases are available on our Research and Teen Social Studies pages.

U.S. History (Gale In Context)

Provides a complete overview of our nation’s past that covers the most-studied events, decades, conflicts, wars, political and cultural movements, and people from reference sources, full-text magazines, academic journals, news articles, primary source documents, images, videos, audio files and links to vetted web sites.

Available with library card

Prospector: Materials from Other Colorado and Wyoming Libraries

​​As a Denver Public Library customer, you can also borrow materials from other libraries in Colorado and Wyoming. Use Prospector to request materials that DPL does not own.

Internet Sources

Before using information you find on the internet for assignments and research, it is important to establish that the information comes from a reliable and appropriate source. The following websites, from government, academic and nonprofit organizations, have been evaluated for authority, accuracy, content and currency.

A description of the treaty that provides related primary sources and a background summary.
This map by John Disturnell shows the U.S.-Mexico border of 1847, including the claimed boundary by the U.S along the Rio Grande. Notes within map describe historical events, including those of the Mexican War.
The United States and Mexican Boundary Survey (1848–1855) set the border between the U.S, and Mexico as part of the Treaty of Guadalupe Hidalgo, which had ended the Mexican–American War. The survey was printed in three volumes, which are available digitally here.
This study of the survey of the boundary line between Mexico and the United States from 1849 to 1855 was prepared in accordance with the Historical Resource Study Proposal. This called for a gathering of documentary and graphic evidence of the boundary survey to aid in the preparation of an interpretive film to be used at Chamizal National Memorial.

Contact the Reference Services department for help with your research project