Michigan Technological University
Michigan Tech University: Santa Ana Volcano
Is Santa Ana's volcano, Ilamatepec, still active today? Read all about it and even see pictures of its fascinating crater at this site.
Yale University
Avalon Project: Address of the Honorable s.f. Austin, March 7, 1836
This is the text of an address Austin made to the people of Louisville, Kentucky explaining the conflict between Texas and Mexico, and asking for support.
Other
Indian Pueblo Cultural Center
Not exclusive to pre-contact, this site has an extensive collection of resources that describe many facets of various Pueblo cultures.
US Army Center
U.s. Army Center of Military History: The Mexican War and After
This site from the U.S. Army's Center of Military History offers a detailed account of the Mexican War and its important battles as well as a description of what occurred after the war.