Developed in Germany in the 19th century, Boxers were originally used for dog fighting and to run down and hold large game such as wild boar and bison until the hunter could arrive. The breed is known for standing up on its hind legs and batting at its opponent, appearing to box with its front paws. Imported to America after World War I, they began to grow in popularity in the late 1930s. (Source: American Kennel Club)