During World War II the Allies were planning their invasion of Sicily (Operation Husky).  One of the deceptions they used to fool the Germans into thinking an invasion would be coming in the Balkans rather than Sicily was Operation Mincemeat.  As deception operations go, Mincemeat was very successful, and is probably one of the most bizarre operations of the entire war.  What made it so strange?  I won't ruin the surprise, but I will say it involves a corpse and a submarine.