Which of the three titles do you find most apt? 2) Why?

This is a discussion board assignment: The Civil War–The Blue & The Gray 
Make sure to answer this question thoroughly and with complete sentences. Tell me all you know and then explain that with specific examples/details.
The Civil War has also been called the “War Between the States” and the “War for Southern Independence.” 1) Which of the three titles do you find most apt? 2) Why?
Are their uniforms significant in this identity?