Of the troops deployed, 53,753 were wounded, injured, or sustained concussion and 415,932 fell sick. A high proportion of casualties were those who fell ill. This was because of local climatic and sanitary conditions, which were such that acute infections spread rapidly among the troops. There were 115,308 cases of infectious hepatitis, 31,080 of typhoid fever, and 140,665 of other diseases. Of the 11,654 who were discharged from the army after being wounded, maimed, or contracting serious diseases, 10,751 men, were left disabled.