21 January: First meeting of Dáil Éireann in Dublin’s Mansion House declares Ireland independent.

From the Houses of the Oireachtas: Dáil100.

21 January: Soloheadbeg ambush in Co. Tipperary. Two members of RIC are killed in an attack by members of the IRA under Dan Breen and Sean Treacy; this is generally regarded as the first engagement of the War of Independence.

From Century Ireland: Two policemen killed in Soloheadbeg attack.