Under a scorching sky at Marine Base Parris Island, two young recruits grapple awkwardly in hand-to-hand combat inside an Octagon training structure. Circling them, the drill instructor barks orders, “Hit her! Punch her! DO something!”

Outside the ring, a mix of male and female Marine hopefuls are helping each other put on protective headgear, preparing for their turn at combat. They are assigned to one of the mixed-gender recruit companies as the Marine Corps moves gradually — and at times reluctantly — to more integrated training at boot camp.

It’s been a bit hit-and-miss.

While companies of men and women train together at the ring, on the obstacle course or at the range, the line of recruits outside the swimming pool presents a sharp contrast. There the companies are broken up into their smaller platoons that remain separated by gender. So as they line up, there is a small group of women standing rod-straight at the front with groups of men in formation behind them.