Compare and contrast the union and confederacy

The Union Army was larger, and was able to draw on a far larger population for replacements. The Union Army had better artillery, and was able to manufacture their own artillery. The Union's forces were made up of a far larger percentage of immigrants, and in general had good junior and mid-level officers, and a lot of rather mediocre top level officers

Is there a passage that comes with this question or should i know this right off the bat, because if it is, i probably have short term memory loss or college is too stressful