Acronym for 'Self Propelled
Anti Aircraft' referring to vehicles designed specifically to combat enemy aircraft. These vehicles are usually lightly armored and is equipped with one or more rapid firing guns. SPAAs found their use during the second world war when
air superiority could not be achieved, now the role of SPAAs shifted to defending against helicopters or
slow, low flying aircraft. A few example of SPAAs includes the
German Wirbelwind, Ostwind, Gepard, the less known Skink, M16 MGMC, and the M163 VADS.