The Battle of Glentaisie, was an Irish battle fought in the north of Ulster on 2 May 1565. The result was a victory for Shane O'Neill over the Clan MacDonald of Dunnyveg. The conflict was a part of the political and military struggle, involving the English and occasionally the Scots, for control of northern Ireland. Although the MacDonalds were a Scottish family, based principally on the island of Islay in the Hebrides, they had long been associated with the Gaelic polity rather than the Kingdom of Scotland.