The war years contributed to additional dramatic changes in city population. The Union Army's presence attracted many fugitive slaves who had escaped from surrounding rural plantations. So many sought protection behind Union lines that the Army set up contraband camps to accommodate them. Memphis's black population increased from 3,000 in 1860, when the total population was 22,623, to nearly 20,000 in 1865, with most settling south of the city limits.[31]
The war years contributed to additional dramatic changes in city population. The Union Army's presence attracted many fugitive slaves who had escaped from surrounding rural plantations. So many sought protection behind Union lines that the Army set up contraband camps to accommodate them. Memphis's black population increased from 3,000 in 1860, when the total population was 22,623, to nearly 20,000 in 1865, with most settling south of the city limits.[31]
In the 1870s, a series of yellow fever epidemics devastated Memphis, with the disease carried by river passengers traveling by ships along the waterways. During the Yellow Fever Epidemic of 1878, more than 5,000 people were listed in the official register of deaths between July 26 and November 27. The vast majority died of yellow fever, making the epidemic in the city of 40,000 one of the most traumatic and severe in urban U.S. history. Within four days of the Memphis Board of Health's declaration of a yellow fever outbreak, 20,000 residents fled the city. The ensuing panic left the poverty-stricken, the working classes, and the African-American community at most risk from the epidemic. Those who remained relied on volunteers from religious and physician organizations to tend to the sick. By the end of the year, more than 5,000 were confirmed dead in Memphis. The New Orleans health board listed "not less than 4,600" dead. The Mississippi Valley recorded 120,000 cases of yellow fever, with 20,000 deaths. The $15 million in losses caused by the epidemic bankrupted Memphis, and as a result its charter was revoked by the state legislature.
Perhaps the most significant effect of the yellow fever on Memphis was in demographic changes. Nearly all of Memphis's upper and middle classes vanished, depriving the city of its general leadership and class structure that dictated everyday life, similar to that in other large Southern cities, such as New Orleans, Charleston, South Carolina, and Atlanta, Georgia. In Memphis, the poorer whites and blacks fundamentally made up the city and played the greatest role in rebuilding it. The epidemic had resulted in Memphis being a less cosmopolitan place, with an economy that served the cotton trade and a population drawn increasingly from poor white and black Southerners.[36]