Mars in 11th house. 

So, lets see what Mars can do in 11th house without any conjunction or aspect from any other planet. 1st lets see what these 2 things represent -

Mars represents our will power, courage, ability to take actions, aggressive nature, anger, our fighting ability, brother, male friends, a boy friend for a girl, a soldier, an athlete and real estate etc.

11th house represents Elder Siblings, Large Organizations, Huge Structures, Network Circle, Entrepreneurship, Friends, Gains, Income and Earnings etc.

So 1st of all, as it is house of earnings and gains, and Mars is a planet of taking action, here Mars makes a person very active and energetic towards his gains, income and money. It means they will be ready to take any action, whatever it takes, to make their earnings better. As it is also house of elder siblings, Mars here gives the person an elder sibling but there might be a power struggle between siblings. As it is also a house of large organisations, Mars here provides will power to person to reach up to the top hierarchy of any big company. At the same time, they can also become a spendthrift. 

From here, Mars aspects the 2nd house of family, wealth and speech. It makes the person dominating towards his family and accumulated wealth but gives a harsh speech. 

Mars next aspect goes to 5th house of sports, education and children. This makes the person very active about sports and education. They can become good sports-persons but they can be dominating towards their children and love interests.

Finally, Mars 8th aspect will go to 6th house and create instability in their job setup with colleagues. It can also bring illnesses of sudden nature and health may be fluctuating. 

Hope this helps. Thanks,

Swami Premanand Bharti