Bethlehem Steel Corporation was an American steel producer founded in 1904 in Bethlehem, Pennsylvania. It became one of the largest steel manufacturers in the United States, playing a crucial role in the industrial growth of the nation, especially during World War I and World War II. The company was known for producing steel for various applications, including construction, shipbuilding, and railroads. In the latter half of the 20th century, Bethlehem Steel faced challenges due to increased competition and changes in the steel industry. The company ultimately filed for bankruptcy in 2001, marking the end of an era for one of America's most significant steel producers.