Hawkeye and Mustang They've known each other since childhood and share a tight bond, with Hawkeye being Mustang's most trusted buddy. They're always there for each other through good times and bad. Hawkeye is an American pit bull terrier breed that was originally used by the U.S. Army to detect explosives and narcotics. Mustang is a nickname for any one of several species of horse that originated in North America. The term comes from the Spanish word "estrella" (star), because these horses were first seen at night when viewed from afar looking like stars on the ground. Today, the term mustang usually refers to a young male horse that has never been owned by anyone else or sold into slavery. However, since the 1970s, the term has been used as a generic label for any new model of horse produced by the Ford Motor Company. In science fiction, a Mustang is a type of fast vehicle built by the Star Fleet Corps of the Galactic Empire. They are capable of reaching speeds of up to 1,620 miles per hour. There are four main subspecies of mustang: the plains mustang, the desert mustang, the Australian stockman's mustang, and the Colombian mustang.