The American Civil War (1861–65) between the North (the Union) and the South (the Confederacy) was a conflict over issues of national identity, economic development, western expansion, and slavery. With roughly 2 million soldiers fighting for the Union and about 800,000 for the Confederacy, the war wrought transformations in the lives of both black and white men and altered ideas about manhood in both the North and the South. It served as a juncture between two regional sets of ideals of manhood and highlighted the race, gender, and class hierarchies on which they were contingent.