| Surname: | O'Brien |
| Initials: | M |
| Rank: | Lance Corporal |
| Army Number: | P/18439 |
| Notes: | MFP. Awarded the 1914 Star, Victory and War Medals. First served abroad (1) France, 25/10/1914 to 7/1/1915 and (2a) Balkans, 28/11/1915 to 12/4/1916 and (1) France, 9/6/1915 to 27/11/1915 and 13/7/1916 to 3/1/1917 and 17/1/1918 to 1/10/1918. Formerly Pte. 2 Leinster Regt. No.4/3654. |