How you take action
You act when you are inspired. A big idea, a trip, a cause or a question can light you up and get you moving fast. Mutable fire keeps you flexible: you change plans easily and enjoy improvising. You may be less interested in the fine print than in the overall direction, and you prefer freedom over rules that seem pointless.
Ambition and work
You want your work to mean something and to keep you growing. Astrologers link Mars in Sagittarius with travel, teaching, publishing, law, sport, philosophy and anything that widens your world. You tend to aim high and dislike being boxed in. A role with variety, movement and room to explore keeps your motivation alive.
Anger and conflict
Your anger is usually frank and short-lived. You say exactly what you think, sometimes with more honesty than tact, and then move on. Injustice and hypocrisy can set you off quickly. The risk is preaching or speaking before thinking about how it will land. Pairing your honesty with a little patience keeps your words persuasive rather than hurtful.
Desire and attraction
Your desire is playful, open and adventurous. Astrologers often say Mars in Sagittarius wants fun, laughter and a sense of exploration in love. You are drawn to people who are curious, optimistic and up for a new experience, and you need a partner who does not try to clip your wings.
Physical energy
Your energy is expansive and loves space. Traditionally this placement is linked with outdoor activity and movement over distance: hiking, running, horseback riding, travel on foot. Variety keeps you engaged, and you may lose interest in a routine that never changes. Astrologers associate Sagittarius with the hips and thighs, which fits a love of long strides.
Challenges
Overreach is the main hurdle. You may take on more than you can finish, promise too much or lose interest once a project needs detailed work. Restlessness can make commitment feel like confinement. Following through on the small steps, and checking the facts before you act on a conviction, lets your enthusiasm carry you further.
How long Mars stays in Sagittarius
Mars takes about 687 days to orbit the Sun, so seen from Earth it comes back to Sagittarius roughly every 1.9 years. Between 1960 and 2040 it passes through Sagittarius 43 times. A typical passage lasts 42 days, and the shortest 41 days. The longest, from Feb 25, 1969 to Sep 21, 1969, adds up to 208 days in Sagittarius, because Mars turned retrograde in or near the sign. In this period, 3 passages last more than 100 days. Everyone born during the same passage shares a Mars in Sagittarius, so the house and aspects of Mars in your own chart add the personal detail.