What was brotherhood of P. O. Box 1142?

Question

The American Military Intelligence Service had two special wings whose core duty was to interview the POWs of the World War Two, known as MIS -X and MIS -Y, (I have no idea what the hyphened letters mean) answered to the name " Brotherhood of P. O. Box 1142"

The American Military Intelligence Service had two special wings whose core duty was to interview the POWs of the World War Two, known as MIS -X and MIS -Y, (I have no idea what the hyphened letters mean) answered to the name " Brotherhood of P. O. Box 1142

Why P.O. Box 1142???

Answer 1

:::::: For more than 60 years, they kept their military secrets locked deep inside. The brotherhood of P.O. Box 1142 enjoyed no parades, no reunions and no wartime stories. Almost no one knew the place in history held by the men of Fort Hunt. But the declassification of military documents and the persistence of Brandon Bies, is bringing the men of P.O. Box 1142 out of the shadows. They questioned Third Reich scientists, u-boat submariners and soldiers at one of the US's most secretive camps. As the world war II progressed, P.O. Box 1142 shifted its attention to scientists in Nazi Germany.

Answer 2

It was a secret POW camp used for interrogation. I am not sure if they did illegal stuff there, but they apparently were not always within the Geneva Convention. The Brotherhood of P.O. Box 1142 are those guards that were there. That was the name of the camp. It went just by the address. They have kept silent of things done there, mostly for security reasons. They interviewed scientist, U-boat crew and various others of importance.