 A 2014-2015 experiment by the Marine Corps with a gender-integrated combat unit found that women were twice as likely to suffer injuries significant enough to remove them from duty, and that women's shooting accuracy was much less than that of men in simulated combat situations.Female soldiers were also found to have lower performance in the basic combat tasks like negotiating obstacles and removing wounded troops from the battlefield.The female skeletal system is less dense, and more prone to breakages.