Members of Clan MacDonald of Glencoe in the Scottish Highlands were massacred, allegedly for failing to pledge allegiance to the new monarchs, William III and Mary II.

The MacDonalds of Glencoe, also known as Clann Iain Abrach, is a Highland Scottish clan and a branch of the larger Clan Donald. Named after Glen Coe, the MacDonalds lived there from the early 14th century, until the glen was largely abandoned during the Highland Clearances of the late 18th century.

The Highlands is a historical region of Scotland. Culturally, the Highlands and the Lowlands diverged from the Late Middle Ages into the modern period, when Lowland Scots language replaced Scottish Gaelic throughout most of the Lowlands. The term is also used for the area north and west of the Highland Boundary Fault, although the exact boundaries are not clearly defined, particularly to the east. The Great Glen divides the Grampian Mountains to the southeast from the Northwest Highlands. The Scottish Gaelic name of A' Ghàidhealtachd literally means "the place of the Gaels" and traditionally, from a Gaelic-speaking point of view, includes both the Western Isles and the Highlands.

The Massacre of Glencoe took place in Glen Coe in the Argyll region of the Scottish Highlands on 13 February 1692. An estimated 30 members and associates of Clan MacDonald of Glencoe were killed by Scottish government forces, allegedly for failing to pledge allegiance to the new monarchs, William II/III and his wife Mary II.

William III, also known as William of Orange, was the sovereign Prince of Orange from birth, Stadtholder of Holland, Zeeland, Utrecht, Guelders, and Overijssel in the Dutch Republic from 1672, and King of England, Ireland, and Scotland from 1689 until his death in 1702. He ruled Great Britain and Ireland with his wife, Queen Mary II, and their joint reign is known as that of William and Mary.