I have a copy of the Clancy Brothers and Tommy Makesthem [sic]Songbook published by Tiparm Music NY, and dated 1964 [3rd printing]
It will of course come as no surprise that it is headed
Arranged and adapted by Liam Clancy and copyrighted by Tiparm Music 1963. It also says this action occurred in the "Black & Tan" war in 1921. The words are similar to Soodlums as quoted by Joe Offer.
John