The Adavoyle Train Ambush takes place on June 24, 1921, during the Irish War of Independence, when the Irish Republican Army’s Fourth Northern Division, led by Frank Aiken, carries out a targeted attack on a British military train near Adavoyle railway station in the rural townland of Adavoyle, near Dromintee, in County Armagh, Northern Ireland.

The train is returning from Belfast, where King George V has just opened the first Parliament of Northern Ireland on June 22. It is part of a heavy security escort for the King, including the 10th Royal Hussars (machine gun troop) and their horses, who have been stationed at the Curragh in County Meath. Three special trains have been arranged to bring them back to Dublin, but the third is attacked.

The IRA plants a mine or detonates a bomb that partially derails the train a mile north of Adavoyle Station, between Newry and Dundalk. The derailment causes ten carriages to be thrown across an embankment, killing and injuring many soldiers and horses.

At least three British soldiers are killed (including a sergeant and a private) and twenty are wounded, some of whom later die from their injuries. The train guard, Frank Gallagher, is killed and two other railway officials are seriously injured. Reports vary about the number of horses killed. Some say over 40 horses are killed while others claim as many as 100. Many horses are shot to prevent them from being captured or causing further casualties. Soldiers reportedly weep for their dead horses, as they had served together in World War I. A local farmer and a train guard are also shot dead in the aftermath.

The attack causes an outcry in Britain, highlighting the IRA’s ability to strike high-profile military convoys. The incident underscores the vulnerability of British forces returning from political events in Ireland and is one of several such attacks during the War of Independence.

The Adavoyle ambush is remembered as a symbolic and brutal act in the conflict, combining military casualties with the killing of animals that have been comrades in war. It also illustrates the IRA’s use of railways as a strategic target during the campaign.

Today, the Adavoyle railway station is in ruins, though the Belfast-Dublin line still passes the site.