Bellonaoriginal name Duellonain Roman religion, goddess of war, identified with the Greek Enyo. Sometimes known as the sister or wife of Mars, she has also been identified with his female cult partner Nerio. Her temple at Rome stood in the Campus Martius, outside the city’s gates near the Circus Flaminius and the temple of Apollo. There the Senate met to discuss generals’ claims to triumphs and to receive foreign ambassadors. In front of it was the columna bellica, where the ceremony of declaring war by the fetiales (a group of priestly officials) took place.