| 20-25 Male Age Group | Army Strength Nov 1918 | Ratio Strength: Age Group | |
| United Kingdom | 1,704,423 | 3,759,471 | 2.21 |
| Australia | 230,125 | 178,342 | 0.78 |
| (198,333) | (0.86) | ||
| Canada | 385,855 | 362,774 | 0.94 |
| (388,038) | (1.01) | ||
| India | 13,154,601 | 573,484 | 0.04 |
| New Zealand | 49,692 | 63,879 | 1.29 |
| South Africa (White) | 65,726 | 18,796 | 0.29 |
| (67,237) | (1.02) | ||
| South Africa (Other) | 226,051 | - | - |
| Total | 15,590,422 | 4,956,746 | 1.00 |
| (5,050,442) | (1.02) |
Notes:
(1) Figures in parenthesis are max strength.
(2) Totals exclude South Africa.
Source: Perry, F.W., The Commonwealth Armies: Manpower and Organisation in Two World Wars.