Landing Zone Mack (also known as Hill 484) was a U.S. Marine Corps base located northwest of Cam Lộ, Quảng Trị Province in central Vietnam.

[1] Hill 484 was the scene of heavy fighting between the 3rd Battalion, 4th Marines and People's Army of Vietnam (PAVN) forces during Operation Prairie in early October 1966.

[2] The base was established by the 3rd Marines during Operation Lancaster II when it was dropped here on 13 August 1968 to head off the PAVN 64th Regiment which was believed to be moving into the area.

[3]: 451–2 On 2 March 1969 the 1st Battalion 4th Marines began Operation Purple Martin north of the Rockpile to reopen Mack and engage the PAVN 246th Regiment which was believed to be located in the area.

With bad weather limiting air support the Marines dug in and were subjected to small arms and mortar fire.