A battle in the War of the Grand Alliance in Ireland in 1690; William III of England defeated the deposed James II and so ended Stuart Catholicism in England; Also called: battle of Boyne.
River in the Republic of Ireland. Rising in the Bog of Allen in County Kildare, it flows 110 km/69 mi NE to the Irish Sea near Drogheda. The Battle of the Boyne was fought at Oldbridge near the mouth of the river 1690.