Mars enters Capricorn about 4 hours after the New moon in Pisces March 17. Mars is exalted in this sign, ruled by Saturn and is considered very powerful. It will remain here until May 16, when it enters Aquarius.
The Sun enters Aries March 20, and this will begin about a 9 day clash (square) between Mars and the Sun. Other planetary clashes in Aries/Capricorn will occur as well, and you can read about them here.
Mars rules our action, and the Sun rules ego, and herein will lie the clashes.
Sun-Mars squares create an energy buildup within that can manifest in a strong desire to assert the personal will, act domineering and aggressive, act out in rash and impulsive behavior, make demands and in general put the personal will on the front burner. This energy will be upsetting, rather than angry to some.
This is also prone to sickness if your are run down (like colds and flu), and especially accidents. Use the utmost caution driving as many people are likely to be agitated over this period of time.
The positive side of this energy is high energy, a take charge attitude and a desire to accomplish a great deal in a short time. Channel your energy here, and exercise is a great option now.
As Mercury turns retrograde March 23, expect this energy to be exaggerated and some may lash out without knowing what they are really talking about. Mercury is operating in Mars' sign (Aries) and this will make people in general even more vocal, whether they have the facts or not.
As always this energy will pay out in the world and we can expect angry debates and angry people if not accidents or disasters. Any battle started could be protracted. Unfortunately, Mars rules young men and guns and there will be a tendency toward violence during this period.
While Mars and the Sun will never be more than one degree away from each other they are exact on these days:
March 22, 2 degrees Aries/Capricorn
March 23, 3 degrees Aries/Capricorn
March 24, the Sun, Mars and the Moon form a t-square at 4-5 degrees of Aries, Capricorn, Cancer. Anger and violence toward women, and upset emotions will result.
March 26, 5 degrees Aries/Capricorn
You would have to know a little about your chart but if any of these degrees match Cardinal planets (Aries, Libra, Cancer and Capricorn) you can expect to be affected on a more personal level.
A calm and rational attitude is the key toward overcoming these energies.
If you are a Capricorn or Capricorn ascendant Mars entering your sign begins a new two year cycle. You may feel energetic and very busy over the next number of days.