About the Timeline

This timeline includes a variety of events and milestones related to homeland security and emergency management. New events will be considered and added as appropriate.

Events on this list include those have been deemed significant in terms of:

  • located in United States or targeting U.S. citizens/property abroad
  • loss of life or injury
  • damage to environment or property
  • monetary loss or economic impact
  • legislative impact or government response
  • historical interest

Sources used in selecting the events included in this list include, but are not limited to, the following:

Comments and suggestions are always welcome and may be directed to hsdl@nps.edu.