The first sign of the zodiac, Aries, is ruled by the planet Mars. Born between March 21 and April 19, the awesome Aries is as strong as they come. Dominant Aries is a force to be reckoned with. They have earned a reputation for being assertive, forceful, passionate and strong. Where do you fall in the realm of your sign? It's time to see how much of an Aries you really are.