According to Gary Gallagher, slavery was the main cause of the Civil War. As questions about the institution of slavery and its future in the expanding U.S. arose, political debates grew heated and tensions arose between those who supported it and those who opposed it, making its way into legislation. At the same time, there were those who not in politics that expressed their opposition to slavery through revolt and commentary. Sectionalism also made its way into major institutions like religion and political parties. Eventually, the election of 1860 and the sectional tensions triggered the South’s secession from the Union. During the war, the Confederacy compensated their smaller enlistable/draftable population by utilizing their large number of the enslaved. Because much of the labor was done by slaves, more of their military-age white men were able to go off and fight. The government expanded greatly, on both sides, in order to accommodate the war efforts and enacted taxes, changed civil liberties, and enlisting drafts.