Mars in the 11th House
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  If Mars is well-aspected to other planets, people with this placement often have a 
  keen desire to act in the best interests of friends or groups in general. However, 
  the basic character of this planet represents personal initiative and it may feel ill 
  at ease in the group oriented eleventh house. Thus, you can enthuse about 
  teamwork and cooperation, but you will often experience difficulties in adapting 
  your highly independent views and opinions to those of your fellows in making 
  compromises. This can be dangerous if you ignore the interests of the people 
  around you and try to force your own way. Perhaps you sense one of the basic 
  inner conflicts which plays a role in all our lives: we are basically social 
  animals, but at the same time we feel a strong desire to define our identities as 
  an independent individuals. Groups, whose members strongly identify with the 
  group's goals and ideals, are formed on the basis of common interests. If we 
  identify ourselves too strongly with the community, our independence is 
  threatened and the desire to redefine our personal boundaries arises 
  instinctively.  
   
  Therefore, it would be a difficult task for you to unite yourself with others who 
  share a common goal without losing your own personality. For this very reason, 
  it would be of immense value if you would try to achieve this task. With Mars in 
  the eleventh house you may also adopt other roles. You may have the ability to 
  stir groups into action. On the other hand, activity within a group or in an 
  organization provides you with the necessary justification to do things that you 
  wouldn't allow yourself to do as an individual. In this way you could make the 
  group carry your personal responsibility. If you engage yourself in a cause 
  which aims to bring about some kind of legal improvement, you should be 
  careful that your warlike approach does not bring about more harm than good.