As American tanks came to a halt on the Euphrates at the close of the war against Saddam Hussein, President Bush called on the oppressed peoples of Iraq to rise up against their ruler. Thousands of peshmerga (Kurdish guerrillas) responded, seizing the towns and countryside of northern Iraq. But after Saddam signed the truce with the U.N. forces, he sent his surviving units north, slaughtering the lightly-armed Kurds and driving millions more into...