Mars in Sagittarius, aimed at the horizon
Mars in Sagittarius means you go after what you want with big aims and a lot of enthusiasm, and you need room to move while you do it. Your anger comes out as blunt honesty: you say what you think is true and assume everyone else wants to hear it.
Mars describes your drive, your temper, your courage and how you compete. Sagittarius is mutable fire, restless and optimistic, so here the planet of action keeps looking at the next hill.
Saying yes to everything
You sign up for the marathon before you own running shoes. You accept the job abroad, the weekend trip, the course in a language you've never studied, and you mean every yes when you say it. Your drive comes from possibility: once something is big enough to be exciting, you'll throw yourself at it.
Causes move you. When you think something is unfair, you'll argue for it at dinner, online and at work, with real conviction and a fair amount of volume. You fight for ideas more than for yourself.
Exercise works best outdoors and far away: long hikes, cycling across a county, any sport with open space. A small gym with no windows drains you.
Desire is drawn to freedom and humor. You want someone who's up for an adventure on short notice and who laughs at the same things. Anyone who tries to pin you down too early gets a polite goodbye.
Too many arrows
The honest tension is follow-through. You say yes to so much that some of it has to drop, and the people waiting on the dropped things feel it. The marathon training stops in week four because a new plan came along. The friend you promised to help move house gets a cheerful apology. You're not careless, you're overcommitted, but from the outside it looks the same.
Then there's the bluntness. When you're angry, you tell the truth as you see it, with no softening, and you're surprised when people are hurt by it. To you, honesty is respect. To them, it was the timing and the tone.
How the rest of your chart steers it
With a Sagittarius Sun too, the whole personality runs on optimism and movement. An earth Sun keeps the big aims and adds the patience to finish them. A Cancer or Virgo Moon makes you more careful with your words, because you feel the hit after you've said it. For the opposite placement, where the same restlessness goes into conversation and detail, see Mars in Gemini.
Mars usually stays in a sign for six or seven weeks, but around its retrograde, about every 26 months, it can stay in one sign for six months or more, so some Mars signs are much more common in certain years. The Mars sign guide shows how to find yours.
Questions
How does Mars in Sagittarius show anger?
Bluntly. You say exactly what you think, sometimes louder than needed, then move on fast and expect the other person to as well.
What is Mars in Sagittarius attracted to?
Freedom, humor and a sense of adventure. You want someone who says yes to the last-minute trip.
Is Mars in Sagittarius competitive?
Yes, but with itself and the goal more than with other people. You chase the bigger challenge, not the opponent.