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Subject
- American Civil War4
- Union Army4
- aging4
- causes of death[remove]4
- census data4
- demographic characteristics4
- disease4
- health status4
- labor force4
- medical records4
- midlife4
- military pensions4
- military recruitment4
- military service4
- mortality rates4
- nineteenth century4
- nutrition4
- socioeconomic status4
- twentieth century4
- veterans4