Spice wrote:
Retrieved fatalities from a 'sewer pit'.....
Wonder what they were doing in it?
Probably members of the Army "construction unit" constructing or repairing the sewage system.. A likely scenario is that heavier-than-air gas (could be any of a wide variety of gasses) leaked and settled in the bottom of the sewer pit where the six were poisoned. The other casualties probably had less exposure to the gas. Sewers produce gasses such as methane and carbon dioxide, both deadly at even moderate concentrations, or it could be welding gasses.