About four million black slaves were freed in 1865. 95% of blacks lived in the South, comprising one third of its total population, while only 5% of blacks lived in the North, comprising only 1% of its total population. Consequently, fears of eventual emancipation were much greater in the South than in the North. Based on 1860 census figures, 8% of males who were aged 13 to 43 died in the Civil War, including 6% in the North and 18% in the South.