231st
231st Infantry Regiment "Avellino"
231st Street station
231st Brigade (United Kingdom)
231st Infantry Division (Wehrmacht)
231st Battalion (Seaforth Highlanders of Canada), CEF
231st Combat Communications Squadron
231st Rifle Division
231st Signal Battalion "Sempione"
Orenco station (TriMet)
Last batch of Imperial Japanese Army Divisions
Pope Clement VIII
2nd Cinque Ports Artillery Volunteers
1st Staffordshire Artillery Volunteers