Greenville County, South Carolina: History
=== 18th and 19th centuries ===
In 1786, due to population growth in Ninety-Six District and the victory of the American Whigs over the British and their colonial Tory and Cherokee allies, the state legislature formed Greenville County (originally spelled Greeneville), named for General Nathanael Greene, the hero of the American southern campaign. Greenville County was the first county created in the overarching Ninety-Six District, but from 1791 to 1798, both neighboring Pendleton County (the other county formed from Cherokee territory in northwestern Ninety-Six District) and it were part of the new overarching Washington District. From 1798 to 1800, it was part of the short-lived overarching Pendleton District. In 1798, all counties were reidentified as "elective districts" to be effective on January 1, 1800; thereafter, the Greenville District was no longer part of Pendleton District. In 1868, the districts were converted back to counties. After the Civil War ended in the 1860s, former slaves gained freedom, the textile industry grew quickly, and cotton farming expanded in the county. Completion of the Southern Railway in 1893 joined the local economy with the rest of the nation.
The Atlantic Coast Line Railroad's consolidation into the 1900s further linked the county with the national economy, and dozens of textile companies opened, with farm workers migrating to associated mill villages. World War I and creation of the Army National Guard's Camp Sevier in Taylors further increased the county's outside connections in the early 20th century. Duke's Mayonnaise was started in Greenville in 1917 and still has its company headquarters in the county.
World War II brought additional contracts for the textile industry in the 1940s. After the war ended, agriculture decreased and business leaders such as Charles E. Daniel and Roger Milliken pursued other industries to replace textiles. Donaldson Air Force Base was converted into an industrial air park (now Donaldson Center Airport) in the early 1960s, and Greenville–Spartanburg International Airport opened then as well.
The 1960s brought gradual racial desegregation until the county's whole school district was integrated in January 1970. Interstate highways I-85, I-185, and I-385 first crossed the county in the 1960s, promoting growth and better economic placement. The mid-1960s reapportionment of state legislative representation into equal-population election districts brought political change, with metropolitan counties such as Greenville gaining influence over rural counties. Greenville County politicians were elected as state house and senate leaders and as state governors (Richard Riley and Carroll A. Campbell Jr.) in the 1960s, 1970s, and 1980s.