 III MAF and 1st MAW controlled all USMC units in Vietnam which now comprised the enclaves at Da Nang, Chu Lai Base Area and Phu Bai Combat Base.On the early morning of 1 July 1965, the PAVN and Vietcong launched a mortar and sapper attack on the base, destroying one F-102 and two C-130s and damaging a further two F-102s and one C-130.In mid-July, VMFA-513 relieved VMFA-531 and VMFA-542 was also deployed to Da Nang AB.