It may look like a simple question but in truth, its very complex and unfortunately, besides a little review here and there you won't be studying it at any other time throughout your K-12 education.
The Civil War is the most referenced American War so it's important that you really try and understand its depth on your own. Watch movies, read books, take these last chapters seriously. Find out why it's so important to our nations history. (Hint: its NOT just about SLAVERY....so please expand your answers beyond that)