In support of the Commandant’s direction that, during the 244th anniversary of the birth of the Marine Corps, all Marines intensely study their profession to “grasp the implications of rapid change around us,” this case study reviews four historical examples of the Marine Corps learning and adapting to the changing character of warfare. This case study will reinforce three primary objectives in that regard. First, Marines will understand the historical precedence for adaptation. Second, Marines will recognize and embrace in mind and spirit the imperative to meet current and future operational challenges. Third, Marines will kindle a Corps-wide enthusiasm for learning and adaptation as embodied in their legacy. Primary Source Supplementary Material World War I: Volume 6, Headquarters 2d Division, August to October Volume 6, Headquarters 2d Division, June to August 1918 Volume 6, Headquarters 2d Division, October to November 1918 Volume 6, Headquarters 2d Division, March to June 1918 World War II: Okinawa, 6th Marine Division, Special Action Report, Phases 1 and 2, Volume 2, 30 April 1945 Part A Part B Part C Part D Okinawa, 6th Marine Division, Special Action Report, Phase 4, Volume 4, 30 June 1945 Part A Part B Okinawa, 6th Marine Division, Special Action Report, Phase 3, Volume 3, 30 June 1945 Part A Part B Part C Part D Okinawa, 6th Marine Division, Special Action Report, Phases 1 and 2, Volume 1, 30 April 1945 Part A Part B Part C Part D Saipan, Commander, Amphibious Forces, Pacific, Task Force 52.2, August 1944 Saipan, Northern Troops and Landing Force Report, August 1944 Gilbert Islands, Commander, 5th Amphibious Force Report, 4 December 1943 [1 of 2] Gilbert Islands, Commander, 5th Amphibious Force Report, 4 December 1943 [2 of 2] Vietnam: Operation Starlite Regimental Landing Team-7, After Action Report (Operation Starlite), 31 August 1965 3d Battalion, 3d Marines, Vietnam War Command Chronology, August 1965 2d Battalion, 4th Marines - Vietnam War Command Chronology, August 1965 After Action Report, Operation Starlite, 18 August - 18 September 1965 Marine Aircraft Group 16, Vietnam War Command Chronology, July - August 1965 Vietnam: Operation Harvest Moon 2d Battalion, 7th Marines, Vietnam War Command Chronology, December 1965 Task Force Delta, After Action Report, Operation Harvest Moon, 8 - 20 December 1965 Vietnam: Khe Sanh 3d Marine Division, After Action Report, Battle of Khe Sanh, April - May 1967 3d Marine Division, Critique of Operations South of Khe Sanh, 2 - 19 June 1968 Vietnam: Hue Task Force X-Ray, After Action Report, 31 January - 2 March 1968 Vietnam City Maps Hue Iraq: an-Nasiriyah An-Nasiriyah Battle Slides (1st day notes) Command Chronology, 2d Marine Regiment, January - June 2003 Command Chronology, 2d Marine Expeditionary Brigade, January - June 2003 An-Nasiriyah Battle Slides (1st day) Executive Summary, an-Nasiriyah History Command Chronology, 2d Battalion, 8th Marines, January - June 2003 Iraq: an-Najaf Command Chronology, 11th Marine Expeditionary Unit, July - December 2004 Command Chronology, 1st Battalion, 4th Marines, July - December 2004 Iraq: Fallujah Operation al-Fajr