on this day, 28 engagements
Battles fought on 9 August
28 engagements in the atlas were fought on 9 August between AD 378 and 1991: 23 battles, 4 sieges and 1 naval action. Among them: Battle of Adrianople (AD 378).
Engagements by date
| Date | Engagement | Place | War |
|---|---|---|---|
| 9 August AD 378 | Battle of Adrianople | Edirne | Gothic War of 376–382 |
| 9 August AD 865 | Battle of the Morcuera | Bugedo | Reconquista |
| 9 August 1062 | Battle of Niså | Nissan | |
| 9 August 1160 | Battle of Carcano | Carcano | Gregorian Reform |
| 9 August 1201 | Battle of Calcinato | Calcinato | Gregorian Reform |
| 9 August 1551 | Siege of Tripoli | Tripoli | Ottoman–Habsburg Wars |
| 9 August 1566 | Battle of Brobacka | Alingsås | Northern Seven Years' War |
| 9 August 1578 | Battle of Çıldır | Kars | Georgian–Ottoman conflicts |
| 9 August 1597 | Siege of Rheinberg | Rheinberg | Eighty Years' War |
| 9 August 1638 | Battle of Wittenweiher | Baden | Thirty Years' War |
| 9 August 1704 | Battle of Poznań | Poznań | Great Northern War |
| 9 August 1780 | Action of 9 August 1780 | Cape St. Vincent | American Revolutionary War |
| 9 August 1793 | Revolt of Lyon against the National Convention | Lyon | French Revolutionary Wars |
| 9 August 1796 | Battle of Altendorf | Bamberg Rural District | |
| 9 August 1799 | Battle of Pech-David | Toulouse | French Revolutionary Wars |
| 9 August 1812 | Battle of Maguaga | Michigan | War of 1812 |
| 9 August 1814 | Battle of Langnes | Langnes | Swedish-Norwegian War 1814 |
| 9 August 1828 | Battle of Akhalzic | Akhaltsikhe | Ninth Russo-Turkish War |
| 9 August 1849 | Battle of Temesvár | Hungarian Revolution of 1848 | |
| 9 August 1862 | Battle of Cedar Mountain | Culpeper County, Virginia | American Civil War |
| 9 August 1862 | First Battle of Donaldsonville | Ascension Parish, Louisiana | American Civil War |
| 9 August 1864 | Siege of Fort Morgan | Fort Morgan, Alabama | American Civil War |
| 9 August 1877 | Battle of the Big Hole | Beaverhead County, Montana | Nez Perce War |
| 9 August 1916 | Battle of Doiran | Dojran Lake | World War I |
| 9 August 1916 | Battle of Bir el Abd | Bir al-Abd | World War I |
| 9 August 1944 | Battle for Hill 140 | World War II | |
| 9 August 1950 | Battle of Nanpéng Island | Chinese Civil War | |
| 9 August 1991 | Battle of Ventersdorp | Ventersdorp |
Only engagements recorded to the day are listed. Dates before 1582 are Julian, as recorded.