on this day, 27 engagements
Battles fought on 12 September
27 engagements in the atlas were fought on 12 September between 490 BC and 1944: 23 battles, 2 sieges and 2 naval actions. Among them: Battle of Marathon (490 BC), Battle of Vienna (1683), Battle of Saragarhi (1897), Battle of Muret (1213).
Engagements by date
| Date | Engagement | Place | War |
|---|---|---|---|
| 12 September 490 BC | Battle of Marathon | Marathon | First Persian invasion of Greece |
| 12 September 1015 | Battle of Florennes | Florennes | |
| 12 September 1213 | Battle of Muret | Muret | Albigensian Crusade |
| 12 September 1217 | Battle of Salvetat | Saint-Julien-sur-Garonne | Albigensian Crusade |
| 12 September 1229 | Battle of Portopí | Coll de sa Batalla | Conquest of Majorca |
| 12 September 1631 | Battle of Abrolhos | Abrolhos Archipelago | Dutch–Portuguese War |
| 12 September 1648 | Battle of Stirling | Stirling | Wars of the Three Kingdoms |
| 12 September 1683 | Battle of Vienna | Kahlenberg | |
| 12 September 1703 | Capture of Poznan | ||
| 12 September 1711 | Battle of Rio de Janeiro | Rio de Janeiro | War of the Spanish Succession |
| 12 September 1793 | Battle of Avesnes-le-Sec | Avesnes-le-Sec | War of the First Coalition |
| 12 September 1808 | Battle of Berby | ||
| 12 September 1813 | Battle of Ordal | Ordal | Peninsular War |
| 12 September 1814 | Battle of North Point | Fort Howard, Maryland | War of 1812 |
| 12 September 1821 | Second Battle of Huachi | Ambato | Ecuadorian War of Independence |
| 12 September 1829 | Battle of Petra | Q15306825 | Greek War of Independence |
| 12 September 1862 | Battle of Harpers Ferry | Jefferson County, Virginia | American Civil War |
| 12 September 1897 | Battle of Saragarhi | Saragarhi outpost | |
| 12 September 1916 | Monastir Offensive | Bitola | Macedonian Front |
| 12 September 1916 | Battle of Kajmakchalan | Kajmakčalan | Macedonian Front |
| 12 September 1916 | Battle of Malka Nidzhe | Voras Mountains | Macedonian Front |
| 12 September 1918 | Battle of Saint-Mihiel | Saint-Mihiel | World War I |
| 12 September 1918 | Battle of Havrincourt | Havrincourt | Western Front |
| 12 September 1939 | Raid on Okęcie and Załuski | Okęcie | 1939 Invasion of Poland |
| 12 September 1942 | Battle of Edson's Ridge | Guadalcanal | Pacific War |
| 12 September 1944 | Battle of Dompaire | Dompaire | |
| 12 September 1944 | Royan pocket | Royan | World War II |
Only engagements recorded to the day are listed. Dates before 1582 are Julian, as recorded.