Some Confederate soldiers switched sides, beginning as early as 1862. When Sherman made his famous march to the sea from Atlanta to Savannah, his army actually grew in number, because thousands of white southerners volunteered along the way. Meanwhile, almost two-thirds of the Confederate army disappeared through desertion. Eighteen thousand slaves joined Sherman, so many that the army had to turn some away. Compare these facts with the portrait common in our textbooks of Sherman's marauders looting their way through a united south. The increasing ideological confusion in the Confederate states, coupled with the increasing strength of the United States, helps explains the Union victory... Many nations and people have continued to fight with far inferior means and weapons... The Confederacy's ideological contradictions were its gravest liabilities, ultimately causing its defeat.