When Mars is in a diurnal sign, like Libra, He’s is in “get-er-done” mode. To hell with motivation and planning, Mars wants action and lots of it in diurnal signs. His diurnal home is Aries, home of exclusive binary logic and action without deep consideration of consequence. Mars is single-minded by day, taking his point of view as white, and the opposing point of view as black.
In Libra, he is in the diurnal home of Venus, the place of justice and of hearing the “other” point of view. This is large bunches of “no-fun” for Mars, and for this reason, Libra is considered one of the homes of Mars’ detriment. (The other is Taurus). Mars can see clear across the Zodiac to his Aries home, and wishes he were there instead of here.
Mars is forced to hear reason in Libra, which is not altogether a bad thing, but it does mean that he can’t get as much accomplished as he might otherwise. For Mars, this is frustrating, for the rest of us, it makes for calmer conditions!
In the real world, this means that those trying to get things accomplished or activated are going to come up against barriers posed by opposing points of view. Military operations will wind down a little, and negotiations between warring parties are likely to be more fruitful. Aggressive political campaigns are likely to be stymied in favor of a better-reasoned approach. Surgeons may suffer from indecision, though corrective surgery from previous errors/failures is likely fare better.
If you are the owner of a Libra Mars, there is probably a bit of hesitation involved in anything you try to accomplish. You might find this transit to be helpful, because the rest of the world is experiencing, for a short while, the hesitation that is part of your nature. You might find you can broker a truce between warring parties, or at very least talk somebody out of doing something really brash.
The hard part for a Libra Mars person is working out when to act, and realizing that this is an issue goes a long way to resolving it. Troublesome placements mean we have to work harder than most to make good use of what might otherwise be considered a character flaw. Some of the more decisive people with Mars in Libra include Bill Clinton, Winston Churchill, and Margaret Thatcher (source astrodatabank). One might accuse these folks of many things, but indecision is not amongst them. One has to wonder how hard they worked to overcome indecision in their earlier years. All of them appear to be better acquainted than most with the opposing point of view, and there lies the useful element of Mars in Libra
Mars is a nocturnal planet, taking great delight in firing up the nocturnal signs and putting scattered emotions and tireless activity into a passionately focused goal.
It has done that job in Virgo, and while Mars will always be seen as malefic, the nocturnal signs are nevertheless a little better for the shake-up, even if they didn’t enjoy it. Mars is moving very quickly in Libra, so the limited aggression and active frustration of this sojourn will be short-lived, beginning August 19th and ending October 4th.
People with diurnal charts (born during the daylight hours) will experience less aggression under this transit, those with nocturnal charts (born at night) will experience more frustration.
All up, Mars in Libra will be marked by what didn’t happen rather than by what did, though some truly fruitful negotiations may come out of it.