Your Mars ruler is secondary to none. However, your Saturn has great influence on your life due to the affairs of Capricorn, especially if your Saturn is part of the Capricorn stellium here.
Your Saturn in the 10th house square to your Ascendant in Aries can make you very driven and ambitious to reach high positions/ranks, bestowing you martial talent, a natural talent for leadership, as well as a talent for management, authority and a good business sense. You have great self-discipline. You are very patient by nature and can be very strict and hard when necessary. However, you can stand out as rather stoic and pushy at certain times. You are definitely not one to back down easily without a fight. You are highly competitive.
With your Capricorn Stellium here, it adds to your self-discipline to carry through extremely demanding work as you have plenty of endurance. You are extremely hard working (workaholic tendency) and excel in planning and organization. The tendency of being slow in starting projects and carrying them through may be offset by your AC in Aries. It gives you the necessary drive to start things due the fire quality of Aries.
Just a note: I have found Capricorn Stellium people to be slow in starting projects, hobbies and so on, having tendencies to jump off in the beginning, but as soon as the project is part of their routine, they follow it through.
Any shy disposition from your Capricorn Stellium may be offset due to your AC in Aries, and Saturn in 10th aspecting your AC in Aries. Though, there can be quite some nervous tendencies at times, where you can explode in rage when pushed during these nervous outbreaks. You may prefer to be part of smaller circles that is trustworthy, instead of being part of larger crowds. However, your AC in Aries again helps to offset any shy tendencies.