Ammonal nitrate is half of the ingredient to make
ammonal explosives. These were used in WWI in large quantities with devastating results.
Photo of aftermath (NSFW)
Many of the German troops at the battle of Messines were in trenches and were killed by the shockwave travelling through the earth.
While these were prepared explosives combining Ammonium Nitrate with powdered aluminum, it was still 50,000 lbs compared to the massive amount of pure Ammonium Nitrate in the facility.
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