About this Unit
Marine Attack Squadron 131 (VMA-131), known as the "Diamondbacks," was a United States Marine Corps Reserve attack squadron. Originally commissioned during World War II as VMSB-131, the unit flew SBD Dauntless dive bombers in the Pacific Theater. After the war, the squadron transitioned through several designations and aircraft, eventually flying the A-4 Skyhawk as a reserve attack squadron based at Naval Air Station Joint Reserve Base Willow Grove, Pennsylvania. VMA-131 was deactivated in 1992 as part of post-Cold War force reductions.
Historical Facts
• Origins in World War II: VMA-131 traces its roots to World War II, originally established as Marine Observation Squadron 4 (VMO-4) in 1943 before being redesignated multiple times.
• Reserve Squadron: VMA-131 was a part of the United States Marine Corps Reserve, providing vital support during peacetime and augmenting active forces during crises.
• Nickname – “Diamondbacks”: The squadron was famously known as the "Diamondbacks," a reference to the pit viper native to the Americas, symbolizing agility and lethality.
• Aircraft Evolution: Over its history, VMA-131 flew several aircraft types, including the F4U Corsair, F9F Panther, and eventually the A-4 Skyhawk series, most notably the A-4M and TA-4J.
• Cold War Presence: During the Cold War, VMA-131 played a critical role in Marine Corps Reserve aviation, maintaining readiness for rapid deployment in the event of conflict with the Soviet Union.
• NAS New York and Willow Grove: The squadron was based at Naval Air Station New York before relocating to Naval Air Station Willow Grove in Pennsylvania, which became its most recognized home.
• Community Engagement: VMA-131 frequently participated in airshows, public events, and flyovers, serving as ambassadors for Marine Corps aviation and fostering community relations.
• Deactivation: As part of post-Cold War defense restructuring, VMA-131 was deactivated in 1992 after nearly 50 years of service, marking the end of an era for Marine Reserve attack aviation.
• Distinctive Tail Markings: The squadron’s A-4 Skyhawks featured distinctive diamondback snake tail art, making them easily recognizable among Marine aviation units.
• Legacy and Honors: Though deactivated, the legacy of VMA-131 lives on through its veterans and contributions to Marine Corps Reserve aviation heritage, with alumni actively preserving its history.
