Overview
The film is based on a book of the same name by Arthur Guy Empey, detailing his service as an American volunteer with the British Army on the Western Front.
| Actor | Age then | Age now | |
|---|---|---|---|
 | 34 | February 22, 1963 (79) | |
 | 20 | January 15, 1967 (69) | |
 | 29 | November 15, 1974 (86) | |
 | -51 | September 28, 1955 (-13) | |
 | 39 | May 28, 1933 (54) | |
 | 73 | April 30, 1918 (73) | |
 | 24 | April 7, 1972 (78) | |
 | - | - | |
| - | - | |
| - | - |