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World War I: Genealogy: Home

Resources for history and genealogy

About World War I

At eleven o'clock this morning came to an end the cruellest and most terrible war that has ever scourged mankind. I hope we may say that thus, this fateful morning, came to an end all wars.

David Lloyd George, speech in the House of Commons, November 11, 1918 (Prime Minister, United Kingdom)

Names for World War I

  • Great War
  • European war
  • World War, 1914-1918
  • First World War
  • World War I
  • World War 1
  • World War One
  • WWi
  • WW1
  • WW


American Expeditionary Force (AEF). American army and marine troops in Europe. The troops were under the command of General John Pershing and arrived in Europe in June 1917. 

Casualty. Military usage: any persons who are not present and ready for assignments. Includes sick, wounded, missing, held prisoner, dead, or any other reason. Currently, often used interchangeably with dead.

Order of Battle (OOB). Military terminology for the description of a military organization and its units.

Pioneer Infantry. Troops responsible for construction projects.

Roll of Honor (Honor Roll). List of those who died in service (under honorable circumstances).

War diaries. Record of the movements and activities of a military unit. All units the size of an infantry battalion, cavalry regiments, artillery brigade and any units larger were required to keep this type of record.

Recommended Sources on the War

Selected resources for background information on the War.

Films and Videos

Genealogy Resources at the University of Delaware Library

Family tree

Although not aimed at genealogy and family history, the collections of the University of Delaware Library (Morris Library) include materials useful to genealogists and family historians.

This Genealogy Research Guide is provided as a service for genealogists. It presents topics and resources to assist researchers.

The UD Library does not specialize in genealogy and does not have staff responsible for genealogy. Library staff cannot conduct research.

For questions about library resources and holdings, use the Ask the Library service.

For questions about getting research assistance, see the suggestions on the home page of this guide or on the topic/resources pages.

American Commerates World War I

These webpages

Created for the Library Workshop: Tracing Your Family's WWI Military History. Presenters: Rebecca Knight, Associate Librarian, and Linda Stein, Librarian, Reference and Instructional Services Department.

  • Thursday, Nov. 19, 2015 (10 a.m.-noon)
  • Thursday, May 14, 2015 (10 a.m.-noon)