A new research project into the Irish Civil War found the number of people who died in the conflict may have been overestimated.
The Civil War lasted 11 months from 28 June 1922 to 24 May 1923 and was over the signing of the Anglo-Irish Treaty in November 1921.
The Treaty formally ended the War of Independence, set the stage for British withdrawal from most of Ireland and the handover of power to an independent Irish government.
The research was led by University College Cork in partnership with RTÉ and the Irish Military Archives by Principal Investigator and Professor Andy Bielenberg and Historian and Research Assistant John Dorney.
It received funding from the Department of Tourism, Culture, Arts, Gaeltacht, Sport and Media as part of the government Decade of Centenaries programme 2023.
The Irish Civil War Fatalities Project is the first systematic investigation into the war.
Its findings suggest the death toll the conflict which had been estimated at 4,000 may be closer to 1,500.
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The project said it provides new insights into the frequency, nature and concentration of violence across Ireland during the Civil War in a major work of public scholarship and fills a significant gap in the historical record.
Researchers have produced a digital map which lists all the combatant and civilian fatalities in the 32 counties.
The map was compiled using death certificates, compensation claims and individual county studies.
It also found that more pro-treaty combatants lost their lives in the Civil War than anti-treaty combatants.
Read more:
The Irish Civil War Fatalities Project: death and killing in the Civil War
All walks of life: civilian fatalities in the Civil War
Unintended victims: child casualties of the Irish Civil War
Buried quietly: the republican dead of the Civil War
While the most number of deaths took place in Dublin, by population Co Kerry suffered the biggest loss of life.
Professor Andy Bielenberg, Principal Investigator, and John Dorney, Historian and Research Assistant, will present research findings and Mike Murphy will speak about the mapping process which lists all the combatant and civilian fatalities in the thirty-two counties.
Ahead of the launch, Dr Bielenberg said: "Drawing on a wide range of sources, this project offers new insights into the spatial and temporal patterns of violence during the Civil War as well as the social profiles, ages and backgrounds of the victims of that violence.
"In addition to building a clearer picture of the combatant fatalities of the Irish Civil War, the new research presents a fuller picture of civilian fatalities.
"We can now see the impact of the conflict on civilians in large swathes of Ireland which remained entirely uncharted until now."
"The interactive map will be an invaluable tool for researching family history, local history, and filling in gaps in our knowledge about the Civil War," Dr Bielenberg added.