18 notable events from 1840.
- Oriental Crisis of 1840
Nov 1840 · Egypt
- Rhine crisis
1840–1841 · —
- Great Raid of 1840
Aug 7, 1840 · United States
- Great Natchez Tornado
May 7, 1840 · United States
- Council House Fight
Mar 19, 1840 · United States
- Tenpo Gimin incident
1840 · Japan
- Maria massacre
Jul 1, 1840–Jul 14, 1840 · Australia
- Cambodian Uprising (1840–1841)
1840 · Vietnam
- Gippsland massacres
Jan 1, 1840 · Australia
- 1840 Ararat earthquake
Jul 2, 1840 · Türkiye
- Storming and Capture of Acre
Nov 3, 1840 · Israel
- Bombardment of Beirut (1840)
Sep 10, 1840 · Lebanon
- Battle of Ammal
Apr 1840 · Algeria
- Howden rail accident
Aug 7, 1840 · United Kingdom
- Pierre-Vincent Eliçabide affair
May 1, 1840 · France
- Fighting Waterholes massacre
from Apr 1, 1840 · Australia
- Fighting Hills massacre
from Mar 8, 1840 · Australia
- Abduction of the matamores of Bou-Chouicha
Nov 11, 1840 · Algeria