Thus, pom-pom ammunition is out of place in the Brigade Ammunition Columns of field artillery, and S.A.A. is relatively unnecessary in that attached to a Heavy Artillery Brigade. Under these circumstances, a column may be unable to meet the unique wants of troops engaged in the vicinity; for instance, a cavalry regiment would send in vain to a heavy artillery ammunition column for pom-pom cartridges. The point to be observed in this is that the fewer the natures of weapons used, the more certain is the ammunition supply.