Song China Experiments with Gunpowder Grenades

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Song military engineers refined the thunderclap bomb - a gunpowder charge packed in a ceramic or paper casing and hurled by hand or trebuchet. These fragmentation devices scattered iron shrapnel and choking smoke across enemy formations. The technology remained a Song state secret, but its implications were seismic: warfare was no longer purely a contest of muscle and blade. Chemistry had entered the battlefield.