Battle of Dunnichen

Battle of Dun Nechtain
Part of the Pictish-Northumbrian conflicts
Pictish symbol stone depicting what was once generally accepted to be the battle.
Date 20 May 685 Location Unknown traditionally near Dunnichen, Angus; alternatively, near Dunachton, Badenoch. Result Pictish victory
Belligerents
Picts	Northumbrians
Commanders and leaders
Bridei III	Ecgfrith  †

The Battle of Dun Nechtain or Battle of Nechtansmere (Scottish Gaelic: Blàr Dhùn Neachdain, Old Irish: Dún Nechtain, Old Welsh: Gueith Linn Garan, Old English: Nechtansmere) was fought between the Picts, led by King Bridei Mac Bili, and the Northumbrians, led by King Ecgfrith on 20 May 685.

The Northumbrian hegemony over Northern Britain, won by Ecgfrith's predecessors, had begun to disintegrate. Several of Northumbria's subject nations had rebelled in recent years, leading to a number of large-scale battles against the Picts, Mercians, and Irish, with varied success. Following sieges on neighbouring territories carried out by the Picts, Ecgfrith led his forces against them, despite advice to the contrary, in an effort to reassert his suzerainty over the Pictish nations.

A feigned retreat by the Picts drew the Northumbrians into an ambush at Dun Nechtain near the lake of Linn Garan. The battle site has long been thought to have been near the present-day village of Dunnichen in Angus. Recent research, however, has suggested a more northerly location near Dunachton, on the shores of Loch Insh in Badenoch and Strathspey.

The battle ended with a decisive Pictish victory which severely weakened Northumbria's power in northern Britain. Ecgfrith was killed in battle, along with the greater part of his army. The Pictish victory marked their independence from Northumbria, who never regained their dominance in the north.

During the seventh century, the Northumbrians gradually extended their territory to the north. The Annals of Tigernach record a siege of "Etain" in 638, which has been interpreted as Northumbria's conquest of Din Eidyn (Edinburgh) during the reign of Oswald, marking the annexation of Gododdin territories to the south of the River Forth.

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