The first woman to complete Infantry Officer Course graduated on Sept. 25, 2017 at Marine Corps Base, Quantico, Virginia. The lieutenant is the first female Marine qualified to lead an infantry platoon. The video shows U.S. Marines participating in a final exercise during the Infantry Officer Course at Marine Corps Air Ground Combat Center Twentynine Palms, California. Infantry Officer Course is considered one of the military’s toughest training. There are currently 1.4 million active duty troops in the US armed forces, and about 15% of them are female.