I don't know of any official documents released by the military or the government on the existence of ghosts. Maybe you could all enlighten us?
The RAF had an official briefing for any aviators flying at the Montrose air base in Ireland to beware of the ghost of Desmond Arthur. It was part of the training of new cadets, since the ghost would regularly show up and haunt new trainees. He'd even be seen flying his biplane from time to time.
But that's nothing new; The Ministry of Defense has had a long history of investigating ghosts. From a recent story:
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Revealed: How the Government studied the paranormal for use in war on terror
6 Oct 2008
Secret documents have revealed the MoD have been studying the paranormal and other unexplained scientific phenomenon for use in the war against terror.
The newly released files show that just after 9/11, the Ministry of Defence conducted a research project into psychics - with the possibility they could be used to locate terrorist cells.
. . .
That's also the official approach according to Nick Pope, who once ran the MoD's UFO project.
He said: "Everything that you think is Sci-Fi, someone in government or in the private sector is trying to get it to work."
In the Nineties, he worked for the MoD in a department blandly named Secretariat (Air Staff), looking at strange phenomena including UFOs, crop circles and even ghost sightings on military bases.
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Nor do I know of any serious scientific study which has proven the ghost phenomenon is real.
Here was an early 20th century study that proves the soul does leave the body. If it leaves the body it must go somewhere - to think otherwise would be practically insane.
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In 1901, MacDougall weighed six patients while they were in the process of dying from tuberculosis in an old age home. It was relatively easy to determine when death was only a few hours away, and at this point the entire bed was placed on an industrial sized scale which was apparently sensitive to the gram. He took his results (a varying amount of perceived mass loss in most of the six cases) to support his hypothesis that the soul had mass, and when the soul departed the body, so did this mass. The determination of the soul weighing 21 grams was based on the average loss of mass in the six patients within moments after death. Experiments on mice and other animals took place. Most notably the weighing upon death of sheep seemed to create mass for a few minutes which later disappeared. The hypothesis was made that a soul portal formed upon death which then whisked the soul away.
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So no, ghosts have nothing on the strong evidence supporting UFO's and their possible origins.
18% of Americans have seen ghosts. What percentage have seen extraterrestrial aliens?