| Name of Country |
Year |
CWA |
Causalities (Estimated) |
| Germany |
1915-18 |
Chlorine, phosgene and Mustard gas |
120,000 |
| Italy |
1936 |
Mustard gas |
15,000 |
| Japan (Two Times) |
1937-45 and 1995 |
Mustard gas |
2500 |
| America |
1962-1967 |
Tear gas and Herbicides |
2000 |
| Afghanistan |
1979-80 |
Mustard gas |
2100 |
| Iraq |
1980-88 |
Mustard gas |
50,000 |
| Syria (Four Times) |
2013-18 |
Sarin gas |
1000 |