The "Manufacturing Belt" refers to a region in the northeastern and midwestern United States known for its high concentration of factories and industrial production. This area, which includes states like Ohio, Michigan, and Pennsylvania, became a hub for manufacturing during the late 19th and early 20th centuries, particularly in industries such as steel, automobiles, and textiles. Over time, the Manufacturing Belt has faced challenges, including globalization and the decline of traditional industries. Many factories have closed or relocated, leading to economic shifts in the region. Despite these changes, the Manufacturing Belt remains an important part of America's industrial history and economic landscape.