"A"@en . . "Air Defense Gun"@en . . . . "The Air Defense Gun is an early AA weapon. Immediately after advancing to the Industrial Age, all Observation Posts owned become Air Defense Guns. When the nation has advanced to the Modern Age, all existing Air Defense Guns automatically upgrade to Radar Air Defense. Air Defense Guns compensate a shorter sight radius for their increased capability of shooting down Biplanes. Like other anti-aircraft units and buildings, Air Defense Guns can also be jammed by scouts."@en . . . . . "170"^^ . . . "The Air Defense Gun is an early AA weapon. Immediately after advancing to the Industrial Age, all Observation Posts owned become Air Defense Guns. When the nation has advanced to the Modern Age, all existing Air Defense Guns automatically upgrade to Radar Air Defense. Air Defense Guns compensate a shorter sight radius for their increased capability of shooting down Biplanes. However they still lack good armor and a well armed force can bring down these buildings without much resistance. They're not at much effective towards Aircraft from future Ages so ground-attack aircraft will demolish these weapons with bitter ease. To counter this, Air Defense Guns should be built in groups and accompanied with ground units. Like other anti-aircraft units and buildings, Air Defense Guns can also be jammed by scouts."@en . . . . . "0"^^ . "13.33"^^ . "8"^^ . . "22"^^ . . . "40"^^ . "9"^^ . "120"^^ . . "25"^^ .