Norman W Birzer & Peter Mersky 
US Navy A-7 Corsair II Units of the Vietnam War [PDF ebook] 

Arriving on station with the USS Ranger (CVA-61) in early December 1967, the first Corsair II squadron became operational immediately and sustained its first combat loss three weeks later.This book tells how the A-7 soon proved its worth supporting ground operations in South Vietnam. As it continued to serve in the ground support role, the navy swiftly introduced the A-7E which soon ran into difficulties with supply lines — perhaps on account of what many perceived to have been a rushed introduction to service. Once these teething problems were resolved, the A-7E became the primary air-to-ground aircraft of the fleet.