Originally published in 2006, this volume from the History Office of the Office of the Secretary of Defense provides a narrative history and assessment of the early years of Robert McNamara's tenure as Secretary of Defense, including McNamara's relationship with Presidents Kennedy and Johnson, the transformation of the Department of Defense as a part of Kennedy's New Frontier, and the Pentagon's handling of the Cuban Missile Crisis, Bay of Pigs episode, and onset of the Vietnam War along with other major national security events and developments during a turbulent and momentous period of the Cold War.

Japan's war in Asia and the Pacific from 1937 to 1945 continues to be a subject of great interest, yet the wartime Japanese army remains little understood outside Japan. Most published accounts rely on English-language works written in the 1950s and 1960s. The Japanese-language sources have remained relatively inaccessible to Western scholars in part because of the difficulty of the language, a difficulty that Edward J. Drea, who reads Japanese, surmounts.
In a series of searching examinations of the structure, ethos, and goals of the Japanese military establishment, Drea offers new material on its tactics, operations, doctrine, and leadership. Based on original military documents, official histories, court diaries, and Emperor Hirohito's own words, these twelve essays introduce Western readers to fifty years of Japanese scholarship about the war and Japan's military institutions. In addition, Drea uses recently declassified Allied intelligence documents related to Japan to challenge existing views and conventional wisdom about the war.

Cracking the enemy's radio code is a task so urgent and so difficult that it demands the military's best minds and most sophisticated technology. But when the coded messages are in a language as complex as Japanese, decoding problems multiply dramatically.

It took the U.S. Army a full two years after the attack on Pearl Harbor to break the codes of the Japanese Imperial Army. But by 1944 the U.S. was decoding more than 20,000 messages a month filled with information about enemy movements, strategy, fortifications, troop strengths, and supply convoys.

In "MacArthur's ULTRA," historian Edward Drea recounts the story behind the Army's painstaking decryption operation and its dramatic breakthrough. He demonstrates how ULTRA (intelligence from decrypted Japanese radio communications) shaped MacArthur's operations in New Guinea and the Philippines and its effect on the outcome of World War II.

From sources on both sides of the Pacific and national security agency declassified records, Drea has compiled a detailed listing of the ULTRA intelligence available to MacArthur. By correlating the existing intelligence with MacArthur's operational decisions, Drea shows how MacArthur usedand misusedintelligence information. He tells for the first time the story behind MacArthur's bold leap to Hollandia in 1944 and shows how ULTRA revealed the massive Japanese mobilization for what might have been (had it occurred) the bloodiest and most protracted engagement of the entire war the Allied invasion of Japan. Drea also clarifies the role of ULTRA in Truman's decision to drop atomic bombs on Japan in 1945, and concludes that ULTRA shortened the war by six to ten months.

A series of 40 illustrated brochures that describe the campaigns in which U.S. Army troops participated during the war. Each brochure describes the strategic setting, traces the operations of the major American units involved, and analyzes the impact of the campaign on future operations. CMH Pubs 72-1 through 72-40.

"Nomonhan" was a strong beginning for the Combat Studies Institute's publishing program. Author Drea's mastery of the Japanese-language source material, his interviews, his thorough use of U.S. archival material all make this a superb study that stands the test of time. Goldman and Coox have written on Nomonhan sice this volume was released, however neither does what Drea does here: render a complete, battalion-level account of the battles from the Japanese perspective. This is tactical level combat explained at its best. Previously available only in hard-to read html and Acrobat files, this completely redesigned book includes 19 maps, dozens of tables and pictures (including combat photographs), appendices, notes, and a bibliography. About the author: Dr. Edward J. Drea was a research fellow with the Combat Studies Institute. He received his masters degree in history from Sophia University, Tokyo and his PhD from the University of Kansas. He lived and studied in Japan for six years.

Originally published in 1984, this a volume in the Combat Studies Institute "Leavenworth Papers" series. On the night of 10-11 July, several thousand Japanese infantrymen attack and broke through U.S. Army covering force units defending the Driniumor River about twenty miles east of Aitape, New Guinea. For the next month U.S. army troops were locked in a battle of attrition with the Japanese, as the Americans fought to restore the breakthrough line and destroy the Japanese attackers. This study describes the events leading up to the Japanese breakthrough and the subsequent American counterattack to restore the original defensive positions. Include photos. maps, tables.

Before World War II, the Imperial Japanese Army (IJA) developed an offensive tactical doctrine designed to allow its infantry forces to fight successfully against a superior foe, the Soviet Union. A battle test of that doctrine's effectiveness occurred from June trough August 1939 along the Outer Mongolian-Manchurian border. This essay follows the daily combat operations of the IJA's 2d Battalion, 28th Infantry Regiment, 7th Infantry Division, for a two-month period. During that time, the 2/28th Infantry was in constant contact with Soviet combined arms forces. In July the battalion participated in offensive operations against Soviet units commanded by General Georgi K. Zhukov. When Japanese tactical doctrine failed against a Soviet combined arms force, the Japanese went on the defensive. Japanese officers, however, regarded defensive doctrine as transitional in nature and adopted it only to gain time to prepare for a counterattack. Defensive doctrine that terrain be held until the resumption of offensive operations that would destroy the enemy. A lack of flexibility doomed the Japanese defensive effort. General Zhukov secretly marshalled his forces and in mid-August used his armor columns to spearhead a double envelopment of the static Japanese units in a position defense. The Soviets encircled the Japanese units, including the 2/28th Infantry, and the Japanese survivors had to fight their way back to friendly lines. The 2/28th Infantry's War Diary provides a vivid day-by-day account of its combat operations. This in turn allows the examination of how the Japanese applied their tactical doctrine on the battlefield. The Japanese tried to use and aggressive tactical doctrine tocompensate for materiel and equipment deficiencies in their army. Such an approach was successful as long as the Japanese could conduct bold offensive operations. When they were forced to adopt a defensive posture, however, discrepancies between tactical doctrine and battlefield reality became apparent. These problems, applicable to any army, highlight fundamental difficulties of force structure, preconceptions of potential enemy capabilities, and the role of doctrine in a combat environment. An examination of small unit tactics is particularly useful to illustrate the dynamics of doctrine as expressed on the battlefield.