Battle of Boyne River

The Battle of the Boyne, fought on July 1, 1690 (Old Style) near Drogheda in Ireland, was a decisive engagement in the war between the deposed Catholic king James II and his Protestant successor, William III of Orange. James had been driven from the English throne in the Glorious Revolution of 1688 and sought to recover his crowns by raising support in Catholic Ireland, backed by his ally Louis XIV of France.

William, who had landed in Ireland to confront the threat directly, commanded a larger and better-equipped army drawn from England, the Dutch Republic, and various Protestant allies. The two forces met across the River Boyne, where William's troops forced a crossing and broke the Jacobite lines. James, his army defeated, fled the field and soon afterward escaped to exile in France, abandoning his Irish cause.

Although fighting in Ireland continued until the Treaty of Limerick in 1691, the Boyne secured William's position and confirmed the Protestant ascendancy in Ireland and the Williamite settlement in Britain. The victory acquired enduring symbolic importance, commemorated thereafter by Protestants in Ireland, and it marked a turning point in the broader European struggle between William's coalition and the France of Louis XIV.