How the unprepossessing Ulysses S. Grant, whose military genius ultimately preserved the Union, came to the forefront in the Civil War is a story as surprising as it is compelling. Forced to resign his commission in the peacetime army for drinking, and thereafter reduced to eking out a living for himself and his family with hardscrabble jobs, at the outbreak of hostilities he suddenly found himself a colonel, and then a general, of volunteers. Grant made the most of unexpected commands. what he knew best, it turned out, was how to wage war, relentlessly and with irresistible force.Early in 1862, with the conflict a year old and both sides in the West relunctant to fight, Grant seized the iniative and took Forts Henry and Donelson, capturing an entire rebel army.