Arizona joined the union as the 48th state on 14 February 1912. It was ceded by Mexico to the United States by the Treaty of Guadelupe Hidalgo on 2 February 1848.
Search This Site
Did You Know?
In 1860 the population of the United States was 31,443,321.
Top Posts & Pages
- Help Contribute by Scanning U.S. Coast Guard Records from the Vietnam War in the Innovation Hub!
- Moon Collectors, LLC Partnership Agreement for Public Comment
- Why do we engage Citizen Archivists?
- Daughters of the American Revolution (DAR) Partnership Agreement Available for Public Comment
- Cultural Institutions Invited to Participate in History Hub