The peninsula was believed to be supporting elements of the 38th VC Main Force Regiment, the 48th VC Local Force Battalion, P-31st Local Force Company and C-95th Sapper Company all of which posed a threat to Quảng Ngãi and allied forces in the area. The operation was planned to be the Marine Corps' largest amphibious assault since the Korean War with BLT 2/26 Marines and BLT 3/26 assaulting the north of the peninsula by helicopter and landing craft while the Americal Division’s Task Force Cooksey, composed of elements of the 46th Infantry Regiment and 1st Cavalry Regiment and the ARVN 2nd Division launching Operation Russell Beach to seal off the southern boundary.
At 07:00 on 13 January the Marines landed on the peninsula meeting negilgible resistance. Once ashore the Marines linked up with Task Force Cooksey and then pushed east forcing the Vietcong towards the sea. While encounters with the Vietcong were minimal, the Marines encountered extensive networks of mines, booby-traps and fortifications. On 19 January 2/26 Marines captured 56 Vietnamese of military age, under interrogation they were found to be members of the C-95th Sapper Company. The Marines evacuated numerous civilians for screening, eventually totaling some 11,900 people.:301
On 24 January 2/26 Marines returned to their amphibious assault ships.:301
Following the conclusion of the assault phase, Operation Russell Beach continued with Marine combined action teams, the 46th Infantry Regiment and the ARVN 6th Regiment operating to cleanse the peninsula of VC/NVA.:303
The operation concluded on 7 February.:303 During the operation the population was largely removed from the peninsula during the assault phase and a clear and search operation was followed by the construction of new roads and hamlets. The population was allowed to return in April 1969 together with South Vietnamese government institutions:125
This article incorporates from websites or documents of the United States Marine Corps.