THE FRAMEWORK OF HEMISPHERE DEFENSE. By Stetson Conn and Byron Fairchild. (1960, 1989; 470 pages, 1 map, bibliographical note, glossaries, index, CMH Pub 4-1.)

The new military policy of hemisphere defense enunciated in 1938 was a reaction to the increasing offensive potentiality of military aircraft. The continental United States could not at that time be invaded or seriously threatened unless the attack was backed by land-based air power. Hostile airplanes in significant numbers could not then be projected across the oceans, but they could be launched from bases established in other parts of the Western Hemisphere within striking distance of the United States and its possessions. The basic mission of the armed forces under the hemisphere defense policy was therefore to prevent the establishment of hostile air bases in the Western Hemisphere. Since eastern Brazil seemed to offer the most likely initial location for such bases, it became the focus of Army plans and actions for hemisphere defense.

In the early summer of 1940 the quick defeat of France and seemingly precarious position of Great Britain created an emergency that required much closer military ties between the United States and the other New World nations. Military collaboration with Canada evolved thereafter with a minimum of friction into a close partnership. Since the Latin American nations at that time had almost no military strength by

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modern standards, the United States had to assume almost complete responsibility for defending them against external attack. At the same time it had to avoid any infringement-real or imagined on Latin American sovereignty. Aided by the trust inspired by the "Good Neighbor" policy of preceding years, the United States persuaded most of these nations to accept its pledges of armed support, and from June 1940 onward it entered into military collaboration with them to an unprecedented degree. This collaboration included a military association with Mexico almost as close as that with Canada-in marked contrast with the hostile attitude of Mexico toward the United States during World War I. The groundwork of successful collaboration with the other New World nations allowed the United States Army to begin to deploy its offensive strength overseas almost immediately after the Japanese attack.

The opening chapters of the present volume (I-VII) are an introduction to this story and to a sequel volume, Guarding the United States and Its Outposts. These chapters trace the evolution of the policy of hemisphere defense in the three years before Pearl Harbor, the gradual merging of hemisphere defense into the broader national policy of opposing German and Japanese aggression by all-out aid to peoples fighting the Axis, and the quick transition to offensive plans and preparations in December 1941. They describe the crises that faced or appeared to face the United States in May 1940 and again in May 1941 (Chs. II, V), the nature of the German and Japanese threats to the Western Hemisphere (Ch. III), and the preoccupation of the United States with the perilous situation in the Atlantic and Europe that blinded the nation to the menace of Japan in the Pacific until the very eve of open conflict. The next three chapters (VIII-X) relate the general plans and measures of the United States for defending Latin America against attack from overseas and for collaborating with the other American republics toward that end. The chapters which follow describe the specific steps in collaboration with Brazil (XI-XII), Mexico (XIII), and Canada (XIV-XV). The concluding chapter (XVI) is a summary and interpretation.

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