Marshall was said to have come to Wilkinson County, Mississippi Territory in 1817. Marshall started his career as a banker for the United States bank in
Woodville, Mississippi. Indeed, he owned five plantations in Mississippi and Louisiana which spanned 14,000 acres, and 10,000 acres in Arkansas. By the 1850s, he produced more than 4,000 bales of cotton every year. In 1860, he owned 817 African slaves. He also owned a large livestock herd. For a time,
Henry Wirz worked as an overseer on one of Marshall's plantations in Louisiana; Wirz would later serve in the Confederate Army as commandant of the notorious prisoner-of-war camp known as
Andersonville. ==Personal life==