Navistar International Corporation is an American manufacturer of commercial trucks, buses, and engines. Founded in 1902, the company is known for producing vehicles under the International Trucks brand. Navistar focuses on providing innovative transportation solutions and has a strong presence in the North American market. In addition to trucks and buses, Navistar also offers parts and services to support its vehicles. The company has made significant investments in technology and sustainability, aiming to develop cleaner and more efficient engines. Navistar is headquartered in Lisle, Illinois, and continues to play a key role in the transportation industry.