During the 20th century, Sumter grew into a major industrial center. Starting with the opening of Shaw Air Force Base (now home to the 9th Air Force, 20th Fighter Wing, and United States Army Central) in 1941, industry grew, especially after World War II. Sumter became increasingly known for textiles, manufacturing, biotech industries, a thriving retail environment, and medical center of its region in addition to agricultural products, which makes it a hub for business in the east-central portion of South Carolina.