The Brigade Ammunition Columns and Divisional Ammunition Columns thus carried ordinarily seven or eight kinds at least of field, horse, howitzer and heavy gun shrapnel, howitzer and heavy gun lyddite shells, cartridges for the four different guns employed and pom-pom cartridges for the cavalry, in all twelve distinct types and varied small arms and machine gun ammunition. Consequently, the rounds of each kind in charge of each ammunition column must vary in accordance with the work expected of the combatant unit to which it belongs.