Mangal (Mars) mahadasha for Tula (Libra) Moon sign

In the Vimshottari system a life moves through nine long periods, each ruled by one planet. The planet that rules the period sets the tone of those years: the areas of life that come forward, and the kind of effort that pays.

The Mars mahadasha lasts 7 years in full. Most people meet it partway through, so the part they live through can be shorter.

Mars stands for energy, courage, drive, land and brothers. Its period tends to be active and direct: a time to start things, compete and defend what matters, best used with a cool head.

Counted from Libra as the first house, Mars rules Scorpio and Aries, your 2nd and 7th houses. During its period the matters of both come forward:

The 2nd house is money, savings, speech and family. Its lord's period tends to bring attention to earning and saving, to what you say and how, and to the family you live with.

The 7th house is partners, marriage and dealings with other people. Its lord's period tends to bring partnerships forward, in marriage and in business, and to teach through other people.

Mars is neither friend nor enemy to Venus, the lord of Libra. Its period tends to give what you put into it; the planets' places in your own chart decide more than this relationship does.

Which mahadasha you are in, and when it began, depends on the Moon's nakshatra at the moment you were born, so it is personal to you. Even within the Mars mahadasha, where the planet sits in your own chart and the sub-periods inside it shape the years more than your Moon sign alone.