Formed in 1785, Spartanburg County and its county seat were named for the Spartan Regiment, a local militia unit that fought in the Revolutionary War. The county has grown from a frontier trading post and later a major textile center to an important, more diversified, manufacturing center with more than 500 manufacturing firms. Spartanburg County also is an international business center with the highest per capita foreign investment and more than 110 international firms, including BMW Manufacturing Corporation. Spartanburg County offers businesses an excellent transportation system, including highways, rail and truck lines, Greenville-Spartanburg International Airport, and proximity to the Port of Charleston. Spartanburg's location at the crossroads of two major interstate highways, I-85 and I-26, put it on the top of the list for business and personal relocation.