This compelling history brings to life the watershed year of 1948, when the United States reversed its long-standing position of political and military isolation from Europe and agreed to an "entangling alliance" with ten European nations. Not since 1800, when the United States ended its alliance with France, had the nation made such a commitment. The historic North Atlantic Treaty was signed on April 4, 1949, but the often-contentious negotiations stretched throughout the preceding year. Lawrence S. Kaplan, the leading historian of NATO, traces the tortuous and dramatic process, which...