As usual, “maintaining unremitting military pressure on the enemy” meant an accelerated planning schedule and an overriding emphasis on speed of execution. The amphibious task force preparing to assault Iwo Jima soon found itself squeezed on both ends. Hill and Blandy had a critical need for the amphibious ships, landing craft, and shore bombardment vessels currently being used by General Douglas MacArthur in his reconquest of Luzon in the Philippines. But bad weather and stiff enemy resistance combined to delay completion of that operation. The Joint Chiefs reluctantly postponed D-day for Iwo Jima from 20 January 1945 until 19 February. The tail end of the schedule provided no relief. D-Day for Okinawa could go no later than 1 April because of the approach of the monsoon season. The constricted time frame for Iwo would have grave implications for the landing force. The experienced V Amphibious Corps under Major General Harry Schmidt, USMC, would provide the landing force, an unprecedented assembly of three Marine divisions, the 3d, 4th, and 5th. Schmidt would have the distinction of commanding the largest force of U.S. Marines ever committed in a single battle, a combined force which eventually totalled more than 80,000 men. Well above half of these Marines were veterans of earlier fighting in the Pacific; realistic training had prepared the newcomers well. The troops assaulting Iwo Jima were arguably the most proficient amphibious forces the world had seen. Unfortunately, two senior Marines shared the limelight for the Iwo Jima battle, and history has often done both an injustice. Spruance and Turner prevailed upon Lieutenant General Holland M. Smith, then commanding Fleet Marine Forces, Pacific, to participate in Operation Detachment as Commanding General, Expeditionary Troops. This was a gratuitous billet. Schmidt had the rank, experience, staff, and resources to execute corps-level responsibility without being second-guessed by another headquarters. Smith, the amphibious pioneer and veteran of landings in the Aleutians, Gilberts, Marshalls, and Marianas, admitted to being embarrassed by the assignment. “My sun had almost set by then,” he stated, “I think they asked me along only in case something happened to Harry Schmidt.” Smith tried to keep out of Schmidt’s way, but his subsequent decision to withhold commitment of the 3d Marines, the Expeditionary Troops reserve, remains as controversial today as it was in 1945. [Illustration: Department of Defense Photo (USMC) 109649 _Burdened with heavy packs and equipment, Marine communicators dash for cover while advancing under heavy fire during the drive inland from the beaches._]