What were the advantages for the union in the civil war?

There where not many advantages, the south had good leaders but the north had more president Lincoln was a huge advantage for the north for his determination to win. The union had 20 million solders as the south only had 9 million. The union also had an industrial base, they had many rail rd. The union made there own supplies guns, cannons,est.      

South carolina was so angry about the election of lincoln that they seceded from the union on december 20, 1860. they attacked fort sumter later, on april 12, 1861.

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