The Prize Cases was an 1862 decision.
The larger point of my previous rebuttal is that the legal system wasn't operating under actual law, but under political compulsion. This was of course the case after April of 1861 and continued for long after the war was over.
I also wish to once again remind you that I never accept an answer that uses the reason "Because the courts say so."
My long learned history of court decisions has convinced me that the courts are often full of idiots and/or political bias, and often express opinions that have nothing to do with actual law.
Anyone basing their argument on a court opinion usually does so because they cannot justify it with common sense and reason.