War of Independence Breen was sworn into the
Irish Republican Brotherhood in 1912 and the
Irish Volunteers in 1914. On 21 January 1919, the day the
First Dáil met in
Dublin, Breen – who described himself as "a soldier first and foremost" – took part in the
Soloheadbeg ambush. The ambush party of eight men, led by
Séumas Robinson, attacked two
Royal Irish Constabulary men who were escorting explosives to a quarry. The two policemen, James McDonnell and Patrick O'Connell, were fatally shot during the incident. The ambush is considered to be the first incident of the
Irish War of Independence and was carried out with the help of intelligence supplied by Breen's younger brother and fellow Volunteer Laurence (1900–1940); "Lar" Breen, then aged 18, was imprisoned for "seditious" activities. Breen later recalled: However, Robinson, wrote: In the same statement, Robinson described the two policemen as he and Paddy Dwyer jumped out and seized the reins of the horse: "The RIC seemed to be at first amused at the sight of Dan Breen's burly figure with nose and mouth covered with a handkerchief; but with a sweeping glance they saw his revolver and Dwyer and me they could see only three of us. In a flash their rifles were brought up, the bolts worked and triggers pressed two shots rang out, but not from the carbines: the cut-off had been overlooked: The two shots came from Treacy and Tim Crowe. Those shots were the signal for general firing. At the inquest the fatal wounds were 'caused by small-calibre bullets'." During the conflict, the British put a £1,000 price on Breen's head, which was later raised to £10,000. He quickly established himself as a leader within the
Irish Republican Army (IRA). He was known for his courage. On 13 May 1919, he helped
rescue his comrade
Seán Hogan at gunpoint from a heavily guarded train at
Knocklong station in
County Limerick. Breen, who was wounded, remembered how the battalion was "vehemently denounced as a cold-blooded assassins" and roundly condemned by the
Catholic Church. After the fight,
Seán Treacy, Séumas Robinson and Breen met
Michael Collins in Dublin, where they were told to escape from the area. They agreed they would "fight it out, of course". Breen and Treacy shot their way out through a British military cordon in the northern suburb of
Drumcondra (
Fernside). They escaped, only for Treacy to be killed the next day in a shootout with British forces. Breen was shot at least four times, twice in the lung. The British reaction was to make Tipperary a special military area, with curfews and travel permits. Volunteer GHQ authorised enterprising attacks on barracks.
Richard Mulcahy noted that British policy had "pushed rather turbulent spirits such as Breen and Treacy into the Dublin area". The inculcation of the principles of guerrilla warfare was to become an essential part of all training. Breen and Treacy were original members of Collins'
The Squad of assassins, later known as the
Dublin Guard, when Tipperary became "too hot for them". and Dublin was the centre of the war. Breen was present in December 1919 at the ambush in
Ashtown beside Phoenix Park in Dublin where
Martin Savage was killed while trying to assassinate the
Lord Lieutenant of Ireland,
Viscount French. The IRA men hid behind hedges and a dungheap as the convoy of vehicles came past. They had been instructed to ignore the first car, but this contained their target. Their roadblock failed as a policeman removed the horse and cart intended to stop the car. He was part of the IRA team that supported the attack on Rearcross Barracks in north Tipperary on 12 July 1920 by securing the main road from
Newport. Breen was to the fore in the IRA moving to establish "flying columns", full-time mobile units of at least 20 men. Columns used guerrilla warfare to strike at often a long way apart in a short period of time. Sometimes they could sleep in underground dug-outs where arms and ammunition could be held.
Ernie O'Malley later appointed Breen quartermaster of the 2nd Southern Division in May 1921, although he still accompanied his column in the field. Breen eventually joined the
Anti-Treaty IRA in its fight against the
Provisional Government of Ireland. He was captured in a major state operation in Tipperary in April 1923. On 11 June 1922 Breen began the All-Ireland Football Championship final by throwing the ball in.
Post-Civil War In August 1923, while still in custody in Limerick Prison, Breen was elected to
Dáil Éireann at the
1923 general election as a republican anti-treaty
Teachta Dála (TD) for the
Tipperary constituency. He spent two months there before going on hunger strike for six days, followed by a thirst strike of six days. While in prison in September 1923 Breen was knocked unconscious by a blow from a prison guard's baton. Breen was released in the autumn after signing a document to desist from attacking the Free State. Breen, then living in Lower Leeson Street, Dublin, sought a wound pension from the Free State in December 1923 under the Army Pensions Act, 1923, and was awarded £150 a year (75% disability from wounds). He later applied for a service pension under the Military Service Pensions Act, 1934. He was awarded nine years' service in 1935 at Grade A for his service with the Irish Volunteers and the IRA between 1 April 1917 and 30 September 1923. Breen wrote a best-selling account of his guerrilla days,
My Fight for Irish Freedom, in 1924. ==Politics==