 Other operations conducted from IV Corps included Operation Cuu Long II ( 16 – 24 May ) , which continued actions along the western side of the Mekong . Lon Nol had requested that the ARVN help in the retaking of Kompong <unk> , a town along Route 4 southwest of Phnom Penh and 90 miles ( 140 km ) inside Cambodia . A 4 @,@ 000 @-@ man ARVN armoured task force linked up with Cambodian ground troops and then retook the town . Operation Cuu Long III ( 24 May – 30 June ) was an evolution of the previous operations after U.S. forces had left Cambodia . 
