There is no public, official, unified, and comprehensive database of domestic terrorism incidents in the United States, so researchers assemble their own datasets when analyzing trends in domestic political violence.
October 25, 2025
high
descriptive
Describes the methodological environment researchers face when studying domestic terrorism in the U.S.
The U.S. Citizenship and Immigration Services' Systematic Alien Verification for Entitlements (SAVE) database can be used to verify individuals' citizenship by crosschecking federal citizenship records against state voter registration lists, and the Trump administration enabled states to have free direct access to the SAVE dataset.
October 21, 2025
high
temporal
Federal-to-state data matching to verify voter eligibility
Japan began maintaining official records on people killed by bears in 2006.
January 01, 2006
high
temporal
Start year for Japan's official fatality records related to bear encounters.