Navistar International Corp. is a holding company, which engages in the manufacture of military truck, proprietary diesel engines, school and commercial buses, and service parts for trucks and diesel engines. It also offers retail, wholesale, and lease financing services for trucks and parts. It operates through the following segments: Truck, Parts, Global Operations, and Financial Services. The Truck segment manufactures and distributes Class 4 through 8 trucks, buses, and military vehicles under the International and IC brands, along with production of proprietary engines, primarily in the North America markets. The Parts segment provides customers with proprietary products together with a wide selection of other standard truck, trailer, and engine service parts. The Global Operations segment consists of the operations of its wholly-owned subsidiary, IIAA, which manufactures and distributes mid-range diesel engines and provides customers with additional engine offerings in the agriculture, marine, and light truck markets. The Financial Service segment provides and manages retail, wholesale, and lease financing of products sold by the Truck and Parts segments and their dealers. It also finance wholesale and retail accounts receivable. The company was founded in 1902 and is headquartered in Lisle, IL.