<p>From the moment it began in 1936, the Spanish Civil War became the political question of the age. Hitler and Mussolini quickly sent aircraft, troops and supplies to the right-wing generals bent on overthrowing Spain's elected government. Millions of people around the world felt passionately that rapidly advancing fascism must be halted in Spain; if not there, where? More than 35,000 volunteers from dozens of other countries went to help defend the Spanish Republic.<br><br>Adam Hochschild, the acclaimed author of <i>King Leopold's Ghost</i>, evokes this tumultuous period mainly through the lives of Americans involved in the war. A few are famous, such as Ernest Hemingway, but others are less familiar. They include a nineteen-year-old Kentucky woman, a fiery leftist who came to wartime Spain on her honeymoon; a young man who ran away from his Pennsylvania college and became the first American casualty in the battle for Madrid; and a swashbuckling Texas oilman who covertly violated US law and sold Generalissimo Francisco Franco most of the fuel for his army. Two <i>New York Times </i>reporters, fierce rivals, covered the war from opposite sides, with opposite sympathies. There are Britons in Hochschild's cast of characters as well: one, a London sculptor, fought with the American battalion; another, who had just gone down from Cambridge, joined Franco's army and found himself fighting against the Americans; and a third is someone whose experience of combat in Spain had a profound effect on his life, George Orwell.</p>