How does "A Rose for Emily" demonstrate that the act of going to war ensured the demise of Southern Aristocracy? I noticed that she didn't have to pay taxes at first because the colonel knew she couldn't pay them. Are there other proofs?
The sites below will give you some suggestions. However, metaphorically, she is in love with something that is dead.... the South and all its life style could be equated to that.
http://www.cliffsnotes.com/WileyCDA/LitNote/Faulkner-s-Short-Stories.id-110,pageNum-5.html
http://www.enotes.com/rose-emily/