Jim, I can't say for certain if it is an official term but I've heard the post war "Union Mythology" called many things :-)

Sorry, I just couldn't resist saying that. To honestly answer your question, if there is such a term, I am not familiar with it. I think a lot of individual personalities have become as much, or more, myth than fact. Lincoln, Custer and Grant have all had tall tales and half truths written about them. Sometimes in a favorable way and sometimes in a way that is not so flattering. Just for the record, I believe the same holds true for many on the Southern side as well. I think we as a nation tend to turn our factual heroes into Herculean images of how we perceive them.

The term "Lost Cause" I find to be meaningless in a larger sense. That is because I believe the idea of defending the Constitution as our Forefathers gave it to us is just as worthwhile today as it ever was. As the saying goes... "Some things were NOT surrendered at Appomattox".