Luft ... — The True Story Of The Great Escape Stalag

Despite the camp being built on sandy soil designed to make tunneling nearly impossible, successfully escaped through "Harry" before a guard discovered the tunnel exit at 4:55 a.m. on March 25.

Led by Squadron Leader (codenamed "Big X"), the prisoners formed the "X Organization" and undertook the simultaneous construction of three massive tunnels—named Tom, Dick, and Harry —at a depth of 30 feet to evade seismic microphones. The True Story of the Great Escape Stalag Luft ...

: Abandoned for escape use after camp expansion but used to store soil and forged supplies. Despite the camp being built on sandy soil