The significations of Mars flourish in the 11th house, as do most matters governed by the house itself. The person will be powerful, courageous and highly ambitious. He will have plenty of opportunities in life and will be quite wealthy. He will achieve his major goals and desires, and may own land or buildings. He will have powerful and influential friends. There may, however, be difficulties in his relationship with them. And if Mars is in any way afflicted, the friendships are greatly disturbed. Mars in the 11th does not at all favor the relationship with the eldest sibling or the paternal uncle. Either of their lives may be rather unfortunate. The person is talented in the use of his hands, mechanical ability, technical fields, and all kinds of repair work, and he may supplement his income in one of these ways. While speculation will be profitable, other 5th house affairs will be harmed by Mars' malefic aspect on that house. There may be abortions, miscarriages, difficulties with children, disturbed love affairs, and a rash or hot temperament.

UCHCHA and SWAKSHETRA (exalted and own house). If Mars is in Capricorn, Aries, or Scorpio in the 11th house, the person will have great ambitions in life, which he is sure to realize. He will be very wealthy, powerful, and successful. He will enjoy a wonderful social life and have many extraordinary friends. His eldest sibling may be famous, prosperous, and long-lived, and he may be involved in military work or a rulership position. There will be abundant opportunity in the person's life, and he will gready benefit from his paternal uncle, who may be powerful and successful.

NEECHA (fallen). If Mars is in Cancer in the 11th house, the person will gready suffer on account of his eldest sibling, or he will have none at all. If one does exist, he or she may lead a tedious life or die early, or the relationship is filled with tension and arguments. The person will not fulfill his main goals and ambitions in life, or he maybe completely devoid of any such goals. The person is weak or powerless and lacking in opportunity. His friends may be below his status, low-class, or very weak in character. There may be tension or arguments in the person's friendships.

Source: «Ancient Hindu Astrology for the Modern Western Astrologer» by James Braha