The Warrenpoint ambush or the Warrenpoint massacre was a guerrilla

Guerrilla warfare

Guerrilla warfare is a form of irregular warfare and refers to conflicts in which a small group of combatants including, but not limited to, armed civilians use military tactics, such as ambushes, sabotage, raids, the element of surprise, and extraordinary mobility to harass a larger and...

 assault by the Provisional Irish Republican Army

Provisional Irish Republican Army

The Provisional Irish Republican Army is an Irish republican paramilitary organisation whose aim was to remove Northern Ireland from the United Kingdom and bring about a socialist republic within a united Ireland by force of arms and political persuasion...

 (IRA) on 27 August 1979. The IRA attacked a British Army

British Army

The British Army is the land warfare branch of Her Majesty's Armed Forces in the United Kingdom. It came into being with the unification of the Kingdom of England and Scotland into the Kingdom of Great Britain in 1707. The new British Army incorporated Regiments that had already existed in England...

 convoy with two large bombs at Narrow Water Castle

Narrow Water Castle

Narrow Water Castle is a famous tower house near Warrenpoint in Northern Ireland, located on the County Down bank of the Clanrye River, which enters Carlingford Lough a mile to the south. Narrow Water Castle was given into state care in 1956 and is one...

 (near Warrenpoint

Warrenpoint

Warrenpoint is a small town in County Down, Northern Ireland. It lies on the northern shore of Carlingford Lough and is separated from the Republic of Ireland by a narrow strait. The town sprang up within the townland of Ringmackilroy...

), Northern Ireland

Northern Ireland

Northern Ireland is one of the four countries of the United Kingdom. Situated in the north-east of the island of Ireland, it shares a border with the Republic of Ireland to the south and west...

. It resulted in the British Army's greatest loss of life in a single incident during the Troubles

The Troubles

The Troubles was a period of ethno-political conflict in Northern Ireland which spilled over at various times into England, the Republic of Ireland, and mainland Europe. The duration of the Troubles is conventionally dated from the late 1960s and considered by many to have ended with the Belfast...

 in Northern Ireland, with 18 soldiers being killed.
At 16:40, an Army convoy consisting of one Land Rover

Land Rover

Land Rover is a British car manufacturer with its headquarters in Gaydon, Warwickshire, United Kingdom which specialises in four-wheel-drive vehicles. It is owned by the Indian company Tata Motors, forming part of their Jaguar Land Rover group...

 and two four-ton trucks was driving past Narrow Water Castle on the A2 road

A2 road (Northern Ireland)

The A2 is a major road in Northern Ireland, a large section of which is often called the Antrim Coast Road because it follows the scenic coastline of County Antrim....

.