Marines reenact the raising of the American flag on Iwo Jima during 2nd Battalion, 23rd Marine Regiment’s 241st Marine Corps Ball, Nov. 12. 2016, at the Ronald Reagan Presidential Library and Museum in Simi Valley, Calif. In addition to celebrating 241 years of the Corps existence, the Reserve unit also commemorated the Marine Forces Reserve Centennial to honor the rich heritage of the Reserves and recognize the contributions of its Marines over the past century.