Passage: The Marine Corps received its first F-4Bs in June 1962, with the "Black Knights" of VMFA-314 at Marine Corps Air Station El Toro, California becoming the first operational squadron. Marine Phantoms from VMFA-531 "Gray Ghosts" were assigned to Da Nang airbase on South Vietnam's northeast coast on 10 May 1965 and were initially assigned to provide air defense for the USMC. They soon began close air support missions (CAS) and VMFA-314 'Black Knights', VMFA-232 'Red Devils, VMFA-323 'Death Rattlers', and VMFA-542 'Bengals' soon arrived at the primitive airfield. Marine F-4 pilots claimed three enemy MiGs (two while on exchange duty with the USAF) at the cost of 75 aircraft lost in combat, mostly to ground fire, and four in accidents. VMCJ-1 Golden Hawks (now VMAQ-1 and VMAQ-4 which has the old RM tailcode) flew the first RF-4B photo recon mission on 3 November 1966 from Da Nang and remained there until 1970 with no RF-4B losses and one damaged by AAA. VMCJ-2 and VMCJ-3 (now VMAQ-3) provided aircraft for VMCJ-1 in Da Nang and VMFP-3 was formed in 1975 at MCAS El Toro, CA consolidating all USMC RF-4Bs in one unit that became known as "The Eyes of the Corps." VMFP-3 disestablished in August 1990 after the Advanced Tactical Airborne Reconnaissance System was introduced for the F/A-18D Hornet. The F-4 continued to equip fighter-attack squadrons in both Marine Corps active and reserve units throughout the 1960s, 1970s and 1980s and into the early 1990s. In the early 1980s, these squadrons began to transition to the F/A-18 Hornet, starting with the same squadron that introduced the F-4 to the Marine Corps, VMFA-314 at MCAS El Toro, California. On 18 January 1992, the last Marine Corps Phantom, an F-4S in the Marine Corps Reserve, was retired by the "Cowboys" of VMFA-112, after which the squadron was re-equipped with F/A-18 Hornets.

Question: What station were the Black Knights based at?
Marine Corps Air Station El Toro