Why was the incidence of disease so high among civil war soldiers?

When congress passed the way davis bill in response to lincolns reconstruction plans the president did what to the bill

Uuttuvu v uutc . cuyumlu 6. which has most weakened guatemala's economy? art 1 foreign debt built up in the 1980s ns evidence of continuing rights violations more than three decades of civil war extremely high levels of poverty

What event from world war l does the image most likely depict