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.

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

Warfare in colonial North America before the Revolution: the Spanish Southwest and Florida, the Anglo-Powhatan and New England wars, the four Anglo-French intercolonial wars, and Pontiac's War, mapped by conflict, state and decade.

The American Revolutionary War: engagements across the Northern, Southern and Western theaters, mapped state by state and year by year, with the surveyed battlefields, the forces engaged and the outcomes recorded.

War in the young republic: the War of 1812 across the Old Northwest, the Chesapeake and the Gulf, and the frontier Indian wars, from the Northwest Indian War and the Creek War to the Seminole Wars and the Black Hawk War, mapped by conflict and state.

The Mexican-American War fought from the Rio Grande to Mexico City, and the frontier and civil conflicts of the 1850s, from the California and Pacific Northwest Indian wars to Bleeding Kansas and the Utah War, mapped by conflict and state.

The complete American Civil War: every battle and campaign across the theaters of war, mapped state by state, with the Union and Confederate regiments that fought, the soldiers who served, and original period photographs.

The post-Civil-War Indian Wars: U.S. Army engagements with Native American nations across the West, from the Apache Wars and the Great Sioux War to the Nez Perce, Red River and Modoc wars, drawn from the Army's own registers and mapped state by state.

Frontier civil conflict between organized settler factions: range and county-seat wars, mining-strike battles, and lawmen and posses against outlaw gangs, drawn from contemporary newspaper reporting and mapped by state and conflict.

Armed engagements on American soil from 1898 to 1945: the military layer of the Mexican border campaign and the two world wars, and the gang layer of the Prohibition-era beer wars and Depression-era outlaw-gang battles, drawn from Wikipedia and historic newspaper reporting and mapped by conflict and state.

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

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

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

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

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

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