More than ten million poison gas' shells, mortar bombs, etc., lie hidden in Europe, many of them relics from World War I. Some were fired and failed to detonate, others were abandoned in old ammunition dumps. Most retain their load of chemical warfare (CW) agents. They are turned up daily in the course of farming and construction. Many European nations have permanent departments concerned with their collection and destruction.
Old munitions, when discovered, are usually heavily corroded and difficult to identify. Is it a CW munition? Or an explosive? If CW, what agent does it contain?...