The MASS 3 Squadron, also known as Marine Attack Squadron 314, is a United States Marine Corps (USMC) unit specializing in the operation of the F-35B Lightning II short takeoff and vertical landing (STOVL) multirole combat aircraft. The squadron, based at Marine Corps Air Station (MCAS) Yuma, Arizona, falls under the command of Marine Aircraft Group 14 (MAG-14) and the 1st Marine Aircraft Wing (1st MAW). The MASS 3 Squadron is primarily responsible for conducting close air support, air interdiction, and precision attack missions in support of ground forces. The F-35B is a fifth-generation fighter jet that offers advanced stealth capabilities, sophisticated sensors, and an array of weapons systems, making it a versatile asset for the USMC.