Where to start Researching Civil War Anti-Treaty Volunteers?

Hi All,

Could you give me a few suggestions as to where to start researching details of an individual (anti-treaty) civil war participant, arrested circa August 1922, interned Newbridge, participated in hunger strike and released December 1923.

Thanks...

PS: I am aware that they are varying descriptions to describe any "group" at a particular time, but is there a valid reason for trying to universally standardise the descriptive terminology used by historians when describing Irish history?


eg:
The anti-Treaty forces
The Government of the Irish Free State
A Provisional Government
Pro-treaty IRA men
Pro and Anti-Treaty leaders
Free State forces
Anti-Treaty units
Free State troops
Free State Forces
Free State soldiers
Anti-Treaty fighters
Anti-Treaty IRA fighters
Anti-Treaty leader
National Army troops
Limerick IRA men
National Army officer
Free State Garrison
Republicans
The Republicans
The National Army
Free State general
Republican leader
Flying Column Leader
The Waterford Brigade
IRA Army Executive
Anti-Treaty members
Anti-Treaty fighters
Anti-Treaty wings of Sinn Féin
Pro and Anti Treaty IRA forces
Pro and Anti-Treaty factions and National Army troops
Pro-Treaty troops
Anti-Treatyites
National Army troops
Division of the Irish Republican Army
RIC men and Anti-Treaty fighters.
Anti-Treaty officer
A Free State column
A Free State expeditionary force
RIC man
Free State soldier
Pro-Treaty Sinn Féin
Anti-Treaty Sinn Féin
Anti-Treaty Four Courts garrison
Provisional Government