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Continue to ChatDeclaration (IV,1), to Prohibit, for the Term of Five Years, the Launching of Projectiles and Explosives from Balloons, and Other Methods of Similar Nature. The Hague, 29 July 1899 https://www.dipublico.org/100524/declaration-iv1-to-prohibit-for-the-term-of-five-years-the-launching-of-projectiles-and-explosives-from-balloons-and-other-methods-of-similar-nature-the-hague-29-july-1899/