Ruler: Mars
Nature: masculine
Quality: cardinal
Element: fire, spiritual
Symbol: the ram
Keywords: assertion, urgency, forthrightness, selfishness
Principle: I am
Destiny: through devotion, Aries sees truth: power of vision

Sign Tarot: The Emperor
Planet Tarot: The Tower

Expectation: welcome
Imperative: to enter, penetrate
Gift: joy of being, expressing
Challenge: obeying impulse
Difficulty: vulnerability, no boundaries
Need: protection

Body parts: head, face, nose
Foods: leeks, onions, strong tasting foods
Colours: red
Flowers: peppermint, bryony, thistle, honeysuckle
Herbs: capers, mustard, cayenne pepper
Metal: iron
Gem: diamond
Animals: red kangaroo
Countries: England, France, Germany, Denmark
Cities: Krakow, Marseilles, Naples, Capua, Verona, Florence

Source: http://www.groundedheavens.com

God of war - accompanied by his retinue of Fear, Dread, Alarm, Discord, and Terror. Known to the Greeks as Ares. Son of Jupiter, consort of Venus and father of Cupid. Patron of farmers.
Mars is another case where the militarist culture of Rome transformed the nature of the god's Greek origins (see Venus). To the Greeks, Ares was an unpleasant character, bloodthirsty, a braggart and a coward. He was a tempestuous lover and an unscrupulous friend. As a Roman, Mars was far more complex. Originally an agricultural god, he was the father of Romulus, founder of Rome. As the empire developed, so did Mars' more bellicose aspects. He developed a code of war and honour which belied his origins.

Mars, second in importance only to Jupiter, was celebrated in Rome during the month of March, which was named in honour of him. On 1 March, the sacred flame in Vesta's shrine was lit, while sacred buildings and the homes of priests were decorated with laurel, the tree of victory always associated with Mars. Horse racing was held on the 14th, before the Ides, and on the 23rd the holy war trumpets were purified.

It is no accident that Mars was so important to Rome, The empire rose and fell within the Age of Aries. Its demise accompanied the beginnings of Christianity and the rise of the Age of Pisces (the Piscean fish being also the early symbol of the Christ).

In french, Tuesday is Mardi. In english the day belongs to Tiu, the Scandinavian god of war and equivalent to Mars.
Warrior and lover, Mars is concerned with assertion and the masculine side. Aggressive, decisive and forthright sexually. Brusque and hasty.