Marines hand over control of I Corps region - Mar 09, 1970 - HISTORY.com

The U.S. Marines turn over control of the five northernmost provinces in South Vietnam to the U.S. Army. The Marines had been responsible for this area since they first arrived in South Vietnam in 1965. The change in responsibility for this area was part of President Richard Nixon’s initiative to reduce U.S. troop levels as the South Vietnamese accepted more responsibility for the fighting. After the departure of the 3rd Marine Division from Vietnam in late 1969, the 1st Marine Division was the only marine division left operating in South Vietnam.