On 23 May, the 7th Battalion and its advisors moved by truck to Tân Mỹ Base where it boarded landing craft for the short trip to the ships of the U.S. amphibious force: the , , and in preparation for Operation Song Than 6-72 an amphibious assault at Wunder Beach 10 km north of the Mỹ Chánh Line and a heliborne assault 6 km inland. The operation was coordinated onboard by the 147th Brigade and 9th MAB staff.
