The Chronicling America website is a useful free resource to look at US newspaper archives. Below are just a couple of the front pages from 28 June 1922 when the Irish Civil War made headlines in a wide range of newspapers.
Many of the papers got their news from news agencies (Associated Press AP). It does not seem (from this random at least) that any of the papers had their own reporters on the ground in Ireland. Some of the papers got a little confused in who was who and the Pro-Treaty side were referred to as 'republicans' on one occasion.
Fierce battle rages between Irish Factions. Image source.
'Irregular troops in fierce battle with regulars in Ireland'. Image source.
'Civil War raging in Dublin today'. Image source.
'Will fight to end says leader of Irish rebels'. Image source.
'Insurgents besieged in Dublin stronghold'. Image source.
'Irish forces battle for control of Dublin'. Image source.
'Irish armies battle in Dublin'. Image source.
'Ireland again in the grasp of a civil war'. Image source.
'Provisionals use force against insurgents'. Image source.
'Many Irish fall; battle raging in heart of Dublin'. Image source.
'Irish Free Staters rout foes'. Image source.
'Irish factions battle fiercely in Dublin'. Image source.
'Fierce battle rages in streets of Dublin'. Image source.
'Buildings crumble in Dublin battle'. Image source.
'Free State troops capture stronghold'. Image source.
'Battle rages in streets of Dublin'. Image source.
'Irish rebels driven from Four Courts in fierce fight; 15 dead, many wounded'. Image source.
'Irish troops battle in Dublin'. Image source.
'Battle is fought in Dublin; Irish irregular troops face defeat by Free State army'. Image source.
'High explosive shells being used in drive on insurgents in Dublin'. Image source.
'V Dubline chysta se biyva'. Image source.
'Dublin scene of reign of terror'. Image source.
'Semne de noui lupte in Irlanda'. Image source.
'Irish republicans shell Dublin rebels'. Image source.
'Free State troops turn field guns on Irish rebels'. Image source.