Naval History and Heritage Command

In 1968, the U.S. and South Vietnamese navies began operation SEALORDS (Southeast Asia Lake, Ocean, River, and Delta Strategy), to cut enemy supply lines from Cambodia into bases in the Mekong Delta. As part of this effort, river patrol boats (PBRs), usually accompanied by helicopters, maintained a constant watch on inland waterways such as along the Vinh Te Canal, which paralleled the South Vietnamese-Cambodian border. Click image to download.