No More Learning

In a German gas           attack with Green-Cross-Difosgen diphosgene at Fleury, on the Maas River, on the night of the 22 to 23 June 1916, the starting point was the consistency of a cloud needed to bring about the same number of deaths in open fields as would be guaranteed by, at least, 50 howitzer shots or 100 canon shots per hectare per minute.