Drumcondra ambush

The new ambush site was at Clonturk Park, situated close to the bridge on the north side of the river. The IRA men chose to set up their positions in some allotments which had a low wall facing St Patrick's College. However, Sergeant Thomas Singleton, a police officer in the Dublin Metropolitan Police (DMP), during his beat, stumbled upon the volunteers as they were preparing their new ambush positions.^[5] Despite being pointed out to him by his unit, Flood chose not to detain Singleton as he was given orders to not "interfere in any way with the uniformed DMP".^[8] Singleton is believed to have then notified the British authorities of the IRA's presence.^[4] Upon receiving word of this, the Auxiliary Division sent detachments from F and I companies to arrest them.^[2]

After waiting at their new ambush site for around 15 minutes, the republicans decided to abort the mission has no other British lorries had come down the road.^[8] Purportedly, a unit of British soldiers was said to have been heading towards the republicans but were warned of an impeding ambush by a local resident named Robert Pike.^[6] Just as the volunteers were about to leave, they spotted a Crossley tender carrying constables from the Royal Irish Constabulary (RIC) heading towards them, at which point they reoccupied their positions. When the RIC lorry had reached the ambush site, the republicans threw a grenade and opened fire at the lorry, forcing it to immediately accelerate and drive away.^[9] After crossing the Tolka bridge, the RIC men encountered a column of auxiliaries from F company under the command of William Lorraine King, which consisted of 2 Crossley tenders and an armoured car.^[10] The police officers notified King that the IRA were in the area before they proceeded to continue on their journey.^[10]

Upon seeing King's detachment as well as another British column coming down the Drumcondra Road, the republicans immediately split up and withdrew from the scene.^[9] Volunteers Michael Magee and Seán Burke, made their escape by running through Clonturk Park, but Magee was struck by gunfire from the Auxiliaries, severely wounding him.^[6] Burke, on the other hand, managed to seek refuge in a house of an elderly man. With the help of a servant girl, Burke was able to convince a search party of Auxiliaries, who had arrived at the premises in search of him, that he was the old man's son.^[5] Mick Dunne, another volunteer, also managed to escape.^[5]

Flood, Bernard Ryan, Thomas Bryan, Dermot O'Sullivan and Patrick Doyle, began making their way to Ballybough along Richmond Road. After spotting the Auxiliary detachment from I Company heading their way, the 5 men attempted to escape by entering one of the houses and exiting through the back door. Flood tried to force the door open by shooting the lock with his revolver but failed. The Auxiliaries then pulled up at the premises and the five men were arrested.^[9][10]

Magee was taken to King George V Hospital for treatment, but due to the severity of his wounds he died the following day. Before his death, he confessed that he was a part of Dublin Brigade's A company and revealed the names and addresses of four other members.^[10]

The five captured IRA men were charged with treason, with four of them receiving the death sentence. O'Sullivan's sentence was reduced to life imprisonment on account of being 17-years-old.^[2] He would spend the remainder of the war in Portland Prison before being released in August.^[6] The IRA did conceive a plan for a rescue attempt, but it never came to fruition.^[11]

Flood, Bryan, Doyle and Ryan along with volunteers Thomas Whelan and Patrick Moran were hanged at Mountjoy Prison on 14 March.^[12]

• Kautt, William H. (2010). Ambushes and Armour: The Irish Rebellion 1919–1921. Dublin: Irish Academic Press. ISBN 978-0-7165-3025-1.
• O'Brien, Paul (2017). Havoc: The Auxiliaries in Ireland's War of Independence. Cork: The Collins Press. ISBN 978-1-84889-306-1.
• O'Halpin, Eunan; Ó Corráin, Daithí (2020). The Dead of the Irish Revolution. Yale University Press. ISBN 978-0-300-25747-2.