Recruits of Kilo Company, 3rd Recruit Training Battalion, change positions above a small pond on the Confidence Course Nov. 7, 2013, on Parris Island, S.C. The course is comprised of 15 obstacles designed to help Marine Corps recruits build confidence by overcoming physical challenges. Kilo Company is scheduled to graduate Nov. 22, 2013. Parris Island has been the site of Marine Corps recruit training since Nov. 1, 1915. Today, approximately 20,000 recruits come to Parris Island annually for the chance to become United States Marines by enduring 13 weeks of rigorous, transformative training. U.S. Marine Corps photo by Cpl. Caitlin Brink/Released.