Timelines

A broad history of Texas, beginning with archaeological evidence and Indigenous societies, then tracing Spanish and Mexican colonization, the revolution and republic, U.S. annexation, slavery and emancipation, Plains conquest, agriculture, petroleum, civil rights, technology and modern infrastructure crises.

The modern state boundary is a reference frame, not a timeless political unit. Tejano communities, Indigenous nations, Mexican citizens, Anglo immigrants and enslaved people encounter very different meanings of independence and citizenship. The republic’s separation from Mexico preserves slavery; its survival after San Jacinto does not settle every sovereignty or border claim.

Annexation on 29 December 1845 is distinguished from the 19 February 1846 transfer of government. The secessionist declaration is quoted through its original document’s context, and Juneteenth is treated as an emancipation announcement and enforcement milestone rather than instantaneous universal freedom. Segregation affecting Mexican Americans is included alongside Black civil-rights struggles.

Cattle and cotton are connected to labor, credit and transport. Petroleum is connected to ports, regulation, global prices and fiscal exposure. Electronics, spaceflight, regional airports, music, universities and women’s political participation broaden the history beyond wars and governors. Harvey and the 2021 freeze show how environmental shocks interact with infrastructure choices.

Useful windows: 1500–1846 for colonial Texas and the republic; 1830–1905 for slavery, war, settlement and the oil transition; 1900–2025 for industry, rights and modern institutions. Deep prehistoric anchors make zooming essential for the modern story.

Reading tools

Use Separate by tags to compare these overlapping strands: Hispano and Tejano histories, Indigenous histories, Spanish and Mexican periods, agriculture, archaeology, borders and government, culture, culture and education, disasters, energy, environment, heritage and conservation, industry, labor, migration and settlement, public finance, religion, revolution and republic, rights and citizenship, settlement, slavery and emancipation, technology, transport, treaties and displacement, violence and memory, war and borders, women and political participation. Expand moments for evidence, image credits and explanatory cards. Undated cards explain concepts without inventing new dated events. Period bands are editorial guides and intentionally overlap. Directional connections have written explanations; other arcs are thematic reading paths, not automatic claims of causality.

Dates and evidence

Proleptic Gregorian BCE/CE calendar, UTC plotting coordinates. A year-only date uses January 1 as an anchor, not an asserted exact day; a month-only date uses its first day. There is no historical year zero. Early Irish Julian-calendar events generally use year-only anchors rather than silently reusing an Old Style day as Gregorian. Broad and approximate dates have presumptive outlines. A coarse year does not claim that an event happened at midnight on January 1. Research cutoff: 3 November 2026; the newest selected events are from 2024. This is a substantial survey, not an exhaustive county-by-county or person-by-person history.

Sources prioritize original treaties, statutes, constitutional documents, archival records and witness collections, supported by tribal histories, public archives, museums, universities, historical societies and institutional chronologies. Each dated event links the evidence used. Institutional summaries can contain shorthand or errors; dates are distinguished from modern commemorations, and contested claims retain qualifications. Witness collections require evaluation of perspective, provenance and corroboration. The selection does not imply every linked source or image is freely licensed.

Reusable images

The timeline cover, key-moment icons and period backgrounds use credited public-domain, CC0 or Creative Commons media permitting reuse. Modern photographs, later paintings, reproductions and memorials are explicitly identified rather than presented as contemporaneous depictions. Backgrounds are thematic illustrations. The app uses duration backgrounds for periods and moment icons for individual events. No changes beyond thumbnail scaling. Image rights remain those stated in each file record.

• Zygmunt Put Zetpe0202 · Alamo Mission, San Antonio, Texas, USA.jpg · CC BY-SA 4.0; license.
• Henry Arthur McArdle · The Battle of San Jacinto (1895).jpg.jpg) · Public domain; license.
• US Army · General Order No. 3.png · Public domain; license.
• United States Geological Survey · View of Spindletop, 1902.png · Public domain; license.
• Daderot · Texas State Capitol - Austin, Texas - DSC07601.jpg · CC0; [license](http://creativecommons.org/publicdomain/zero/1.0/deed.en).
• Griffith & Griffith · A big tip in Galveston2.jpg · Public domain; license.
• Adam Cuerden · Eugene F. Kranz at his console at the NASA Mission Control Center.jpg · Public domain; license.