| German Empire | 78,000,000 |
| Austria-Hungary | 49,500,000 |
| Turkey | 31,580,000 |
| Bulgaria | 4,500,000 |
| ______________ |
Total 163,580,000 Population of nations at war 1,561,261,344 World’s population 1,721,426,000 SBBS 581.3
-“The World War,” A. G. Daniells, p. 11. SBBS 581.4