User blog comment:Gundam Legilis/Volume 1 Weapons In Depth- Crocea Mors/@comment-10390252-20140617140229/@comment-24994749-20140617162609

WEll, the opening narration did imply humans have been using dust as part of weapons since practically year zero. Wherever "The War" Juane speaks about was against the faunus or Creatures of Grimm, one would think weapons by that time already had dust-fueled mechanism.