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M104 (155 mm Chemical Agent)
The M104 was a 155 mm chemical agent, aka gas, artillery projectile (shell), which was developed in the US around World War Two (WW2). The M104 projectile has been filled with a number of chemical warfare agents (CWAs), which has included the vesicants H and HD. The M104 was the designation for a family of three chemical projectiles, which are essentially the same other than their filling. The family included the aforementioned M104 chemica...
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