The Major Arcana Tarot Card allocated to the sign of Aries is The Emperor card. The general meaning of this card is leadership, dominion, structure, government, Paternity, Sight & Vision, competition, being first and military might.
The Minor Arcana Cards of the Two, Three and Four of Wands have less obvious connections to the sign of Aries. However Aries is a fire sign, which aligns it with the Suit of Wands, the Fire suit. When a Decan Wheel is consulted (see image below), the first Decan of Aries is found to correspond to the Two of Wands, (Mastery, or the Lord of Dominion.) The second Decan corresponds to the Three (Virility, Quickening of Creative Projects, or the Lord of Established Strength) and the third Decan to the Four (Creative Checkpoint, or the Lord of Perfected Work). If your Sun sign is Aries, you can determine which minor card is “your” card, and it can be used as an alternate Identifier, or you may contemplate how the card is thematic in your life. Additionally, using the Decan Wheel allows for time to be introduced into readings.
What exactly is a Decan Wheel? A “Decan Wheel” divides a circle, which has 360 degrees, into 36 10-degree segments (“dec” means 10.) Each of these 36 segments correspond to one of the Minor Arcana cards in the Tarot, excluding the Aces and the Court Cards. The 36 segments are grouped into 12 groups of 3. The 12 groups are the Zodiac signs, and the 3 within those groups are the Cardinal (1st decan), Fixed (second decan) and Mutable (third decan) sub-aspects of each sign. So for example if your birthday is October 6, your birthday falls within the approximate 10- day segment of the 2nd decan of Libra. This indicates your birthday is a Fixed sub-aspect (the 2nd decan) of a Cardinal sign (Libra), and corresponds to the 3 of Swords. Reflecting on your particular set of aspect & correspondence will undoubtedly inspire insights about yourself and your life.
Sources:
Tarot Correspondences by T. Susan Change
Tarot Deciphered by T. Susan Chang & MM Maleen
Qabalistic Tarot by Rober Wang