But the South had several serious drawbacks. Its population at 1860 was roughly 9 million people, of whom more than 3 million were slaves, versus more than 21 million in the North. There were only 18,000 manufacturing plants of any kind in the South, as opposed to the North's more than 100,000. Of these, only two were capable of producing [[rolled iron]], one which produced [[gunpowder]], and none capable of producing [[firearms]]; there were twenty-seven gun manufacturers in Massachusetts alone. More than 70% of all [[railroad]] mileage was north of the Ohio River; the South had the remainder. | But the South had several serious drawbacks. Its population at 1860 was roughly 9 million people, of whom more than 3 million were slaves, versus more than 21 million in the North. There were only 18,000 manufacturing plants of any kind in the South, as opposed to the North's more than 100,000. Of these, only two were capable of producing [[rolled iron]], one which produced [[gunpowder]], and none capable of producing [[firearms]]; there were twenty-seven gun manufacturers in Massachusetts alone. More than 70% of all [[railroad]] mileage was north of the Ohio River; the South had the remainder. |