Anti-aircraft artillery was extensively used in combat in the First World War, though such weapons had made their debut in the Franco-Prussian War in 1870, when the besieged French used balloons for observation and communication and the Prussians used the first custom built 1-pounder gun to try and shoot them down.
It was, however, not until the Second World War that anti-aircraft artillery came into prominence, shooting down more aircraft...
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