Operation Sinsay

Operation Sinsay
Part of Laotian Civil War; Vietnam War
Date 11 February – 31 March 1972 Location Rear of Communist forces on the Ho Chi Minh trail Territorial changes No significant change Royalist guerrillas cut supply lines of attacking North Vietnamese, force a retreat
Belligerents
Kingdom of Laos Supported by  United States	North Vietnam Supported by:  Soviet Union  People's Republic of China
Units involved
Groupement Mobile 42 Bataillon Commando 613, Bataillon Commando 614, Thai artillery contingent, Groupement Mobile 41, Groupement Mobile 42, Groupement Mobile 43	9th PAVN Regiment, 39th PAVN Regiment
Strength
Regimental-strength	Regimental-strength
Casualties and losses
Unknown	Unknown

Operation Sinsay (11 February – c. 31 March 1972) was a Royal Lao Government offensive of the Laotian Civil War. The planned offensive was pre-empted by prior moves by the opposing People's Army of Vietnam (PAVN); they struck on 6 March 1972. Although the Communist attack reached Laongam, 21 kilometers from Pakxe and the Thai border, and the defending Royalist battalions there were reassigned to fight in Operation Strength on the Plain of Jars, monarchist guerrillas were able to interdict Communist supply lines and force a Vietnamese retreat by the end of March 1972.