A British report on chemical warfare stresses the fact that it is technically
possible and tactically valuable to use mustard gas bombs with incendiary
bombs in such a way that the areas covered by the two types overlap, or at
least are adjacent.
The tactical value of this combination lies in the hampering of the fire-fighting
services by the presence of contamination in the area where they must
work, and in the threat of casualties among personnel.
The report emphasizes that the mustard gas will cause confusion and
delay among the fire-fighting troops, especially at night, thus allowing the fire
to spread. No important proportion of the mustard gas will be destroyed by fire.