on this day, 15 engagements
Battles fought on 21 December
15 engagements in the atlas were fought on 21 December between 1361 and 1944: 12 battles, 2 sieges and 1 naval action.
Engagements by date
| Date | Engagement | Place | War |
|---|---|---|---|
| 21 December 1361 | Battle of Linuesa | Huesa | Q35810458 |
| 21 December 1421 | Battle of Kutná Hora | Kutná Hora | Hussite Wars |
| 21 December 1576 | Siege of Vredenburg | Vredenburg/Kronenburg | Eighty Years' War |
| 21 December 1779 | Battle of Guadeloupe | Guadeloupe | American Revolutionary War |
| 21 December 1795 | Battle of the Rocher de La Piochais | Landéan | French Revolution |
| 21 December 1808 | Battle of Molins de Rey | Molins de Rei | Peninsular War |
| 21 December 1808 | Battle of Sahagún | Sahagún | Peninsular War |
| 21 December 1813 | Siege of Huningue | Huningue | |
| 21 December 1817 | Battle of Mahidpur | Mahidpur | Third Anglo-Maratha War |
| 21 December 1845 | Battle of Ferozeshah | First Anglo-Sikh War | |
| 21 December 1866 | Battle of the Hundred-in-the-Hands | Wyoming | Red Cloud's War |
| 21 December 1870 | Second Battle of Le Bourget | Le Bourget | Franco-Prussian War |
| 21 December 1873 | Battle of Cầu Giấy | ||
| 21 December 1916 | Third Battle of Torreón | Torreón | Mexican Revolution |
| 21 December 1944 | Battle of St. Vith | Sankt Vith | Western Front |
Only engagements recorded to the day are listed. Dates before 1582 are Julian, as recorded.