BATTLE OF THE BOYNE
JULY 11, 1690

The Boyne is a river in Ireland.

The Battle of the Boyne was fought on July 11, 1690. Or, if you go by the Old Style, on July 1, 1690.

English king William III fought ex-king James II and won.

The Battle of the Boyne was part of the Jacobite War.

And here is the map

Battle of the Boyne
Click to enlarge