MacArthur's ULTRA : codebreaking and the war against Japan, 1942-1945

Author(s)

• Drea, Edward J.

Bibliographic Information

MacArthur's ULTRA : codebreaking and the war against Japan, 1942-1945

Edward J. Drea

（Modern war studies）

University Press of Kansas, c1992

• : pbk

Note

Includes bibliographical references (p. 275-282) and index

Description and Table of Contents

Volume

ISBN 9780700605040

Description

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 US Army a full two years after the attack on Pearl Harbour to break the codes of the Japanese Imperial Army. But by 1944 the US 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 ow MacArthur used - and misused - intelligence 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.

Volume

: pbk ISBN 9780700605767

Description

It took the US army two full years after the attack on Pearl Harbour to break the radio codes of the Japanese Imperial Army. But by 1944, the US 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 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. By correlating the existing intelligence with MacArthur's operational decisions, Drea shows how MacArthur used - and misused - intelligence information. He also clarifies the role of ULTRA in Truman's decision to drop atomic bombs on Japan in 1945, and examines the role of ULTRA on the outcome of World War II.

by "Nielsen BookData"

Details

• NCID: BA13853688
• ISBN:
  • 0700605045
  • 0700605762
• LCCN: 91016842
• Country Code: us
• Title Language Code: eng
• Text Language Code: eng
• Place of Publication: Lawrence, Kan.
• Pages/Volumes: xv, 296 p.
• Size: 24 cm
• Classification:
  • LCC : D767
  • DC20 : 940.54/26
• Subject Headings:
  • LCSH : World War, 1939-1945 -- Campaigns -- Pacific Area
  • LCSH : World War, 1939-1945 -- Cryptography
  • LCSH : World War, 1939-1945 -- Military intelligence -- Pacific Area
  • LCSH : MacArthur, Douglas, 1880-1964 -- Military leadership
  • LCSH : Pacific Area -- History
• Parent Bibliography ID:
  • BA01297463