on this day, 18 engagements
Battles fought on 30 May
18 engagements in the atlas were fought on 30 May between 1161 and 1971: 12 battles, 5 sieges and 1 naval action.
Engagements by date
| Date | Engagement | Place | War |
|---|---|---|---|
| 30 May 1161 | Siege of Milan | Milan | Gregorian Reform |
| 30 May 1434 | Battle of Lipany | Lipany | Hussite Wars |
| 30 May 1443 | Siege of Bremgarten | Bremgarten | |
| 30 May 1592 | Siege of Steenwijk | Steenwijk | Eighty Years' War |
| 30 May 1621 | Siege of Saint-Jean-d'Angély | Saint-Jean-d'Angély | Huguenot rebellions |
| 30 May 1778 | Battle of Cobleskill | Cobleskill, New York | American Revolutionary War |
| 30 May 1794 | Battle of Port-Républicain | Port-au-Prince | War of the First Coalition |
| 30 May 1794 | Battle of Gosselies | Gosselies | War of the First Coalition |
| 30 May 1795 | Battle of Saint-Bily | Plaudren | French Revolution |
| 30 May 1796 | Battle of Borghetto | Valeggio sul Mincio | French Revolutionary Wars |
| 30 May 1798 | Action of 30 May 1798 | English Channel | French Revolutionary Wars |
| 30 May 1798 | Battle of Three Rocks | County Wexford | Irish Rebellion of 1798 |
| 30 May 1824 | Kasos Massacre | Kasos | Greek War of Independence |
| 30 May 1848 | Battle of Goito | Mantua | First Italian War of Independence |
| 30 May 1857 | Siege of Lucknow | Lucknow | Indian Mutiny of 1857 |
| 30 May 1863 | First Battle of Chruślina | January Uprising | |
| 30 May 1864 | Battle of Old Church | Hanover County, Virginia | American Civil War |
| 30 May 1971 | Battle of Snuol | Vietnam War |
Only engagements recorded to the day are listed. Dates before 1582 are Julian, as recorded.