CASUALTIES: THE ALLIED POWERS
| COUNTRY | # mobilized | dead | wounded | prisoners and missing | total casualties | casualties as % of total mobilized |
| RUSSIA | 12,000,000 | 1,700,000 | 4,950,000 | 2,500,000 | 9,150,000 | 76.3 |
| FRANCE | 8,410,000 | 1,375,800 | 4,266,000 | 537,000 | 6,159,800 | 73.3 |
| GREAT BRITAIN | 8,904,467 | 908,371 | 2,090,212 | 191,652 | 3,190,235 | 35.8 |
| ITALY | 5,615,000 | 650,000 | 947,000 | 600,000 | 2,199,000 | 39.1 |
| UNITED STATES | 4,355,000 | 126,000 | 234,000 | 4,526 | 350,300 | 8.0 |
| JAPAN | 800,000 | 300 | 907 | 3 | 1,210 | 0.2 |
| RUMANIA | 750,000 | 335,706 | 120,000 | 80,000 | 535,706 | 71.4 |
| SERBIA | 707,343 | 45,000 | 133,148 | 152,958 | 331,006 | 46.8 |
| BELGIUM | 267,000 | 13,716 | 44,686 | 34,659 | 93,061 | 34.9 |
| GREECE | 230,000 | 5,000 | 21,000 | 1,000 | 27,000 | 11.7 |
| PORTUGAL | 100,000 | 7,222 | 13,751 | 12,318 | 33,291 | 33.3 |
| MONTENEGRO | 50,000 | 3,000 | 10,000 | 7,000 | 20,000 | 40.0 |
| TOTAL ALLIES | 42,188,810 | 5,152,115 | 12,831,004 | 4,121,090 | 22,089,709 | 52.3 |
CASUALTIES: THE CENTRAL POWERS
| COUNTRY | # mobilized | dead | wounded | prisoners and missing | total casualties | casualties as % of total mobilized |
| GERMANY | 11,000,000 | 1,773,700 | 4,216,058 | 1,152,800 | 7,142,559 | 64.9 |
| AUSTRIA - HUNGARY | 7,800,000 | 1,200,000 | 3,620,000 | 2,200,000 | 7,020,000 | 90.0 |
| TURKEY | 2,850,000 | 325,000 | 400,000 | 250,000 | 975,000 | 34.2 |
| BULGARIA | 1,200,000 | 87,500 | 152,390 | 27,029 | 266,919 | 22.2 |
| TOTAL CENTRAL POWERS | 22,850,000 | 3,386,200 | 8,388,448 | 3,629,829 | 15,404,477 | 87.4 |
CASUALTIES: GRAND TOTAL
| ALL COUNTRIES | # mobilized | dead | wounded | prisoners and missing | total casualties | casualties as % of total mobilized |
| GRAND TOTAL | 65,038,810 | 8,538,315 | 21,219,432 | 7,750,919 | 37,494,186 | 57.6 |
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Think this is horrifying? Check out the Spanish Flu,
that killed twenty-one |
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