Operation Deckhouse Five was conducted by the United States Marine Corps and South Vietnamese Marine Corps forces along the Mekong River Delta, as part of the Vietnam War. The operation was notable in that it was a sizable, combined U.S. Marine and Vietnamese Marine amphibious operation and it was the last Special Landing Force (SLF) amphibious landing to take place beyond the boundaries of I Corps. The operation occurred January 6–15, 1967. January 8, 1967