| Surname | Cassidy | |||
| First Name(s) | John P. | |||
| Place of Birth | Dublin | |||
| Club(s) | Bohemians | |||
| Service | British Army | |||
| Rank | Company Sergeant Major | |||
| Service Number | 24927 | |||
| Previous Service Number(s) | - | |||
| Regiment or Corps | Royal Dublin Fusiliers | |||
| Unit(s) | 10th (Service) Battalion | |||
| Previous Regiment(s) or Corps | - | |||
| Unit(s) | - | |||
| Type of Casualty (If applicable) | - | |||
| Theatre of War (If applicable) | - | |||
| Date of Death (If applicable) | - | |||
| Place of Death (If applicable) | - | |||
| Place of Burial/Commemoration (If applicable) | - | |||
| Grave/Memorial Reference (If applicable) | - | |||
| Awards and Decorations | - | |||
| Citation(s) | - | |||
| Supplementary Notes | ||||
