· Abolitionists
· Alexander Stephens (Vice President of the Confederate States
of America)
· Alfred Terry (Union General)
· Alligator, U.S.S. (Union submarine)
· Ambush
· Army
· Antietam (Maryland), battle of
· Appomattox Court House (Lee surrenders to Grant)
· Aquia Creek (Virginia), battle of
· Artillery
· August Kauz (Union General)