The only problem lies in the definition that one would receive.
War is so complex and multifaceted that it is truly understood by only a few people.
Wars date far back into history, and they have been fought for more reasons than could be listed. It seems strange, but untimalely, they are fought for one reason. Freedom has been the issue of every war since the beginning of time, and whenever a group of individuals feels that their freedom has been infringed upon, war is always possibility. It is only logical that in a war there must be some form of a protagonist as well as an antagonist, but in many cases it is unclear who gets which label. The American Civil War is a perfect example.