Others in the outgoing unit had reported odd sounds. “It is weird what you hear and don’t hear around here,” he added.

Each successive detachment that guards the Rock appears to add its own layer to the legend, which has spread through the Marine units pushing into southern Helmand.

There is talk of members of the Taleban entombed in caves below; the bodies buried on the summit are identified confidently as dead Russian soldiers from the ill-fated Soviet invasion.

Corporal Jacob Lima’s story is the latest addition. One night he was woken by the sound of screaming. It was Corporal Zolik, a Marine who has since been moved to a unit farther south. “He was yelling and begging me to go up to the firing point he was guarding,” Corporal Lima, 22, told the men taking over from him. “When I got there he said that he was sitting there when he heard a voice whisper something in his ear. He said it sounded like Russian. He begged me to stay in there with him till he was relieved from guard duty. After that he really didn’t like standing post up there.”

The Marines’ predecessors, a unit of Welsh Guards, also produced tales of the unexpected. “The Brits claimed to see weird things, hear noises,” Corporal Lima said. “Lots of them said it’s creepy at night, especially from midnight till 4am. You see a lot of unexplained lights through night-vision goggles.”

Its elevation has clearly made the Rock a natural defensive position for centuries. It is not a rock, though it resembles one. Medieval arrow slits and the remains of fortified turrets on its eastern flank show that this was once a large mud fort that collapsed in on itself and was probably built upon in turn. The locals say that it dates back to Alexander the Great, and another similar structure is visible in the distance to the south, part of a supposed line of such forts built at some point in Afghanistan’s history of invasion and war.
Eerie outpost unnerves US Marines with strange lights and whispers in the night - Times Online