The online database at soldierswills.nationalarchive.ie gives people the opportunity to search for the will of their relatives who were killed in action.
The National Archives holds over 9,000 wills of enlisted and non-commissioned soldiers from the thirty-two counties of Ireland who fought in the British Army in the World War I and in the South African war of 1899-1902. The collection does not include wills of commissioned officers.
For information about joining, leaving and suspending mail (eg during a holiday) see the list website at https://www.jiscmail.ac.uk/cgi-bin/webadmin?A0=archives-nra