Here are Mars in Sagittarius interpretive resources on the forum:
Primary section: https://www.solunars.com/viewtopic.php?f=13&t=32#p123
Garth Allen: https://www.solunars.com/viewtopic.php?f=13&t=33#p138
Mars in Sagittarius has similarities to and differences from Sun in Sagittarius. To help discern these similarities and differences, here is a link to the earlier Sun in Sagittarius discussion: https://www.solunars.com/viewtopic.php?f=51&t=1821
My current concise summary of Mars in Sagittarius (always subject to change) reads:
Here on Solunars, people with Mars in Sagittarius include myself, The Scales Both Ways, andIdealist (not necessarily pragmatic). Serious about subjects of interest: sincere, devoted, studious (seems hardworking; it's really love or zeal). Passionate with beliefs; moral courage; persuasive. Innovative, ambitious, strategic. Thrives in classic styles. Many exude air of mystery or fantasy (branding?). Many are identified with ideologies, -ists, & -isms.
and occasional participants gmugmble. (Not a lot of Sag Marses here, in contrast to the huge list of Gemini Marses.)