The first one of Mars in Nakshatras, i.e. Mars in Ashwini Nakshaktra.
Let’s look at important things here –
Mars - Mars represents our will power, courage, ability to take actions, aggressive nature, anger, our fighting ability, brother, male friends, a boy friend for a girl, a soldier, an athlete and real estate etc.
Ashwini – Ashwini is 1st nakshatra, so it comes with the nature of pro-activeness and be first everytime. It is also nakshatra of Healers or Doctors as its deity is Ashwini Kumars, the metaphysical healers. It is also nakshatra of illusion, cheating and confusion. For more info on Ashwini, please check this - https://www.astrosaxena.com/ashnaksh.
Aries – As Ashwini is part of Aries, Aries sign and its representations become important here. Aries is the 1st sign of zodiac belt, so it represents the things and energy of 1st house of horoscope like Self, Personality etc. Besides that, Aries is the sign of our individuality, our aggression, our actions, our competitive ability etc. Aries is ruled by Mars and it is consisted of 2 and half Nakshatras named Ashwini, Bharani and Krittika.
Mars – As Mars rules Aries, Mars’ position and dignity is important to know about the overall functioning of any planet in Aries.
Ketu – Likewise as Ketu rules Ashwini, Ketu’s position and dignity is important to know about the overall functioning of any planet in Ashwini
Houses Involved – Also, we can’t afford to forget the houses involved as a planet can be ruling different houses and sitting in different house for every person as per ascendant and planet’s position. To know overall affect, we have to consider the houses involved as those areas of life are being impacted.
Interpretation of Mars in Ashwini Nakshatra – When Mars is in Ashwini, 1st of all it is a very strong Mars as Mars is in own and Mool Trikon Sign. These people can be seen as very courageous, strong-willed and active people. They are the real go getter type of people. They would love to be 1st in whatever they do. Now, as Ashwini is very much connected with healing and healers, their actions go in health care related work. Due to lordship and energy exchange with Ketu, they can easily become surgeons. As Ashwini is represented by twin horses, they can be interested in Veterinary Health Care. Mars-Ketu energy exchange can also make them Surgeons. We can also see them as warriors or soldiers. But then comes the other side of this placement too where they can be very aggressive and impulsive. At times, they can be violent too as Ketu is headless and Mars connection with Ketu can make them headless in matters of their actions or aggression. They need to redirect their aggressive tendencies in a more positive actions. As Ketu is related with occult and spirituality, it can be that positive action where they can invest their energy. Overall, it is a very good position if they can utilize their anger or aggression positively.
Role of Mars – As we are trying to interpret Mars only, we need not to look for Mars's position and dignity separately as Aries's lord.
Role of Ketu - Likewise, Ketu's placement is important to guide Mars in right direction, being Ashwini's lord.
Other Factors – And of course, we need to consider conjunction, aspects, house lordship, house position and dashas etc to know the exact results of Mars in Ashwini.
Conclusion – So, this is how I see Mars in Ashwini can work in a chart.
Hope this helps. Please post any comment or query you may have.