The Canadian Army Trophy (CAT) competition started in 1963 when the Canadian government donated a silver replica of a Centurion tank to the country that obtained the highest score during a tank gunnery that was hosted by the Canadian Army 4th Mechanized Brigade forward deployed in West Germany. This tank replica later became known as the Canadian Army Trophy for NATO Tank Gunnery. The competition was established to foster excellence, comraderie and competition among the armor forces of the NATO countries in Western Europe. The winner of the Canadian Army Trophy, which remains the property of Canada, retains it until the next competition and is responsible for its safe custody. The competition was held annually through 1968; and in 1970 it was decided that it would be held every two years at Bergen-Hohne, West Germany beginning with a competition in 1973; later the competition would also be held at Grafenwöhr. Each member country was invited to field a 'team' (a tank company of four platoons of 3 AFVs) to represent their respective Armies. Nations represented included Canada, Belgium, United Kingdom, the Netherlands, West Germany and the United States.