Operation Blackstone was a part of Operation Torch, Allied landings in Africa during World War II. This supporting mission was the American capture of the French port of Safi in French Morocco on the morning of 8 November 1942 as part of a larger operation to capture Casablanca in Morocco. The unit responsible for the operation was the US 47th Infantry Regiment. Safi surrendered on the afternoon of November 8. By November 10 the remaining defenders were pinned down and the bulk of Harmon's forces raced to join the siege of Casablanca. The Vichy French soldiers surrendered.