The 11th house represents friends, group affiliations, hopes, wishes, and future plans. With Mars in this house, the person wants to assert themselves and be actively involved in their interactions with friends, like-minded groups, and colleagues.
They will likely be very enthusiastic and dynamic in this collective sphere. They may be able to energize and inspire their peers, taking on a leading role in the group. This could manifest in organizing team-building activities, sports competitions, group volunteer work, or even a joint business venture with friends.
The person's friends tend to be assertive, active, and initiative-taking as well. However, if Mars is in challenging aspects, there may also be a tendency for conflicts within the friend group.
In their personal relationships, this individual is drawn to an energetic and driven partner who can match their own active nature.
Overall, the Mars in the 11th house placement indicates a person who wants to channel their drive and ambition through group involvement and camaraderie, often taking on a leadership role among their peers and social circles.