Ammunition column
An Ammunition Column was a support echelon of a British or Dominion brigade or division during the First World War and consisted of dedicated military vehicles carrying artillery and small arms ammunition for the combatant unit to which the column belonged, generally an Artillery Brigade or a Divisional Artillery. Thus, the Ammunition Columns of a division, formed of the brigades of field artillery, carry reserve ammunition for the guns, the machine guns of the infantry and the rifles of all arms.