The siege of Kinsale, also known as the battle of Kinsale, was the ultimate battle in England's conquest of Gaelic Ireland, commencing in October 1601, near the end of the reign of Queen Elizabeth I, and at the climax of the Nine Years' War—a campaign by Hugh O'Neill, Hugh Roe O'Donnell and other Irish lords against English rule.

Ulster is one of the four traditional or historic Irish provinces. It is made up of nine counties: six of these constitute Northern Ireland ; the remaining three are in the Republic of Ireland.