Imagine howitzers designed to kill being replaced by industrial grade sound systems that, instead of shooting explosives, plays melodic tunes and beats that can pacify soldiers so that both sides can come out of their trenches, come together, and have a nice dance in moments of peace. This would be similar to what happened during Christmas Eve in World War 1 when the Germans and British troops walked out of their trenches, came together in no man's land, and shared cigarettes and schnapps with hugs and respect.