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
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.
