Operation Sealords - Phase One

Phase One

In the first phase of the Sealords campaign allied forces established patrol "barriers," often using electronic sensor devices, along the waterways paralleling the Cambodian border. In early November 1968, PBRs and riverine assault craft opened two canals between the Gulf of Siam at Rach Gia and the Bassac River at Long Xuyen. South Vietnamese paramilitary ground troops helped naval patrol units secure the transportation routes in this operational area, soon named Search Turn. Later in the month, Swift boats, PBRs, riverine assault craft, and Vietnamese naval vessels penetrated the Giang Thanh-Vinh Te canal system and established patrols along the waterway from Ha Tien on the gulf to Chau Doc on the upper Bassac. As a symbol of the Vietnamese contribution to the combined effort, the allied command changed the name of this operation from Foul Deck to Tran Hung Dao I. Then in December American naval forces pushed up the Vam Co Dong and Vam Co Tay Rivers west of Saigon, against heavy enemy opposition, to cut infiltration routes from the "Parrot's Beak" area of Cambodia. Operation Giant Slingshot, so named for the configuration of the two rivers, severely hampered Communist resupply in the region near the capital and in the Plain of Reeds. Completing the first phase of the Sealords program, in January 1969 PBRs, assault support patrol boats (ASPB), and other river craft established patrol sectors along canals westward from the Vam Co Tay to the Mekong River in Operation Barrier Reef. Thus, by early 1969 a patrolled waterway interdiction barrier extended almost uninterrupted from Tay Ninh northwest of Saigon to the Gulf of Siam.