From "Gibbon's Secrets" - World War II Time Line - Operation Mincemeat-April 30th 1943

Operation-Mincemeat was a highly successful Allied deception plan against Axis Forces when planning the invasion of Sicily. The operation involved releasing a dead man in a life jacket off the coast of Spain; a briefcase attached to the body contained fake documents identifying the man as a Major William Martin and copies of fake Allied invasion plans stating the Allies were planning an invasion of Sardinia rather than Sicily.