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The Roman god Mars
Mars was equivalent to the Greek god of war, Ares, the only son of Zeus and Hera. In Italy Mars was originally an agricultural god as well as a god of war. However, it was for victory in war that the increasingly militarized state of Rome turned to Mars. His main altar in Rome stood in the Campus Martius (Field of Mars). In the Imperial period (31 BC - AD 476) the focus of his worship became the Temple of Mars Ultor ('the Avenger'), in the Forum of Augustus. This was built by the emperor Augustus (reigned 31 BC - AD 14) to commemorate his avenging the death of his adopted father Julius Caesar in 44 BC. Mars appears in art as a strong and heavily-armed man.