on this day, 17 engagements
Battles fought on 21 May
17 engagements in the atlas were fought on 21 May between 1363 and 1982: 11 battles, 3 sieges and 3 naval actions. Among them: Battle of Aspern-Essling (1809), Battle of Arras (1940).
Engagements by date
| Date | Engagement | Place | War |
|---|---|---|---|
| 21 May 1363 | Siege of Valencia | Valencia | War of the Two Peters |
| 21 May 1381 | Battle of Nevele | Nevele | Hundred Years' War |
| 21 May 1592 | Battle of Craon | Craon | Anglo-Spanish War |
| 21 May 1640 | Battle of Sant Celoni | Sant Celoni | Thirty Years' War |
| 21 May 1643 | Capture of Wakefield | Wakefield | First English Civil War |
| 21 May 1745 | Battle of Anguilla | Anguilla | War of the Austrian Succession |
| 21 May 1809 | Battle of Aspern-Essling | Lobau | War of the Fifth Coalition |
| 21 May 1834 | Siege of Jerusalem | Jerusalem | Peasants' revolt in Palestine |
| 21 May 1863 | Siege of Port Hudson | East Baton Rouge Parish, Louisiana | American Civil War |
| 21 May 1863 | Battle of Plains Store | East Baton Rouge Parish, Louisiana | American Civil War |
| 21 May 1863 | Battle of Kadyszem | Kadyš | January Uprising |
| 21 May 1879 | Battle of Iquique | Tarapacá | War of the Pacific |
| 21 May 1919 | Battle of Alexander Fort | Tupkaragan District | Russian Civil War |
| 21 May 1919 | Battle of Salgyr Yana Sala | Velyka Novosilka | |
| 21 May 1940 | Battle of Arras | Arras | World War II |
| 21 May 1944 | Battle of Wakde | Wakde | Pacific War |
| 21 May 1982 | Battle of San Carlos | San Carlos Water | Falklands War |
Only engagements recorded to the day are listed. Dates before 1582 are Julian, as recorded.