It involved the dumping at sea of captured German chemical weapons following the end of World War II.
In the aftermath of the Nazi defeat in World War II, the occupying allies found large amounts of stockpiled German chemical weapons.
They quickly convened the Continental Committee on Dumping and came to agreement pertaining to the destruction and disposal of the chemical stockpile.
The allies decided that each of the four nations would destroy the German weapons, on their occupied territory, in whatever manner was most convenient.
The United States undertook Operation Davy Jones' Locker between June 1946 and August 1948, and it involved the scuttling of 38 ships containing between 30,000 and 40,000 tons of captured German chemical weapons.