Answer The factories made military supplies for Union Army, making any needed resources available to them. The Union also had many railroads. ... The Union also had to conquer foreign land. The Confederate strengths were that they had to defend.And. For confederacy The Union had a bigger army obviously if there were 12 million more people in population. They also had the majority of factories and money which was essential in a war. The government supported the union as well. A bigger navy also proved to be useful during the war.
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