"There has been this band of brothers idea that there is something special about having only men, and adding women will ruin it."

"The study doesn’t bear that out.”

The [Marine] Corps approached the question of integration differently from other branches. It commissioned the nine-month ground combat study that put 300 men and 100 women in teams that performed combat skills ranging from shooting to hiking and climbing walls.

“Instead of seeing if women could meet standards, they essentially set up a race to see who was better,” [said  Ellen Haring, a senior fellow at the advocacy group and a reserve Army colonel]. The study found all-male units overwhelmingly outperformed integrated units in physical tasks — particularly tasks requiring upper body strength, such as evacuating an injured Marine from a turret or throwing a backpack onto a wall. But, the report said, integrated groups excelled at complex decision-making. It also concluded that adding women to all-male groups would probably improve the behavior of the groups as a whole.