Free US Historical Research Resources

Full Aubrey research reports for 22 notable US locations across all major historical periods. No login required.

Long-form guides to American historical records, from Civil War archives to colonial land grants and frontier history.

Listed historic places, landmarks, buildings and districts across all 50 states, each with the history and significance of the site.

American military engagements from the colonial wars and Revolution through the Civil War, Indian Wars, and beyond, mapped by state and era.

Original photographs from the American Civil War, browsable by state, alongside Union and Confederate regiments and the engagements they fought.

The regiments raised in each state, from the Confederate South to the wholly Union North and the divided border states, with the towns where they formed and the battles they fought.

Prehistoric sites spanning 5,000 years, from Cahokia and Chaco Canyon to Poverty Point and Mesa Verde.

Verified Indigenous nations, traditional territories, and documented histories drawn from federal records and primary historical sources.

Historical figures connected to US locations, from colonial settlers to Civil War commanders and frontier leaders.

Population history from the first federal census onward for every US county, alongside the historic places and battles recorded within each one.

Key events documented by location, from founding dates and migrations to battles, disasters, and community milestones.