Rung Sat Special Zone

The actual name, Rừng Sác, is a Sino-Vietnamese word that roughly translated to "salty forest," a reference to its proximity to the saltwater marshes of the delta.

[2] Following attacks on allied shipping on the Lòng Tàu River, from 27 March to 6 April 1966, 1st Battalion 5th Marines and two Battalions of Vietnamese Marines launched Operation Jackstay, a search and clear operation along the Lòng Tàu shipping channel killing 63 VC and seizing and destroying large supply caches.

The unit’s twelve 57-foot fiberglass-hulled MSBs, along with Republic of Vietnam Navy (RVNN) minesweeping motor launches, continuously swept the river to ensure the safety of the merchant ships.

Patrols were conducted early in the morning from Nhà Bè Base using paravanes and chain drag sweeps to sever electrical wires that connected mines in the river with VC guerrillas ashore ready to trigger them.

[7]: 43–4 Heavy VC activity against U.S. merchant ships and river patrol forces on the Long Tau occurred during the period from December 1965 to February 1967.

A force of U.S. and South Vietnamese riverine combatants; attack helicopters; and U.S., Australian and Thái infantry units swept through Nhơn Trạch and part of the Rừng Sác.

[7]: 47–8 The Rung Sat formed the western boundary of the 1st Australian Task Force (1 ATF) tactical area of responsibility.