In March 1918, the massive United States Navy cargo ship USS Cyclops vanished without a trace while sailing through the Atlantic Ocean. The ship was traveling from Barbados to Baltimore carrying manganese ore and over 300 crew members and passengers. No distress signal was ever sent, and no wreckage was ever recovered. The disappearance became one of the greatest non-combat losses in U.S. Naval history. Many theories attempt to explain what happened. Some historians believe the ship may have been overloaded or damaged during a storm. Others have linked the mystery to the Bermuda Triangle, fueling decades of speculation and paranormal stories. More than a century later, the fate of the USS Cyclops remains unknown.