Ammunition Columns, Brigade or Divisional, were officered and manned by the
Royal Artillery and national equivalents. Intended for direct affiliation to their Brigades, and Divisions, they were additionally called upon to furnish ammunition to any unit requiring it during an action. The Officers and Gunners of the R.A. employed with an Ammunition Column were, as a matter of course, immediately available to replace casualties in the batteries. The Horse Artillery and Heavy Brigades of Artillery each had their own Brigade Ammunition Column (BAC), organized in much the same way and performing similar duties. The Brigade Ammunition Column of the Heavy Brigade was divisible into three sections, so that the three batteries, if operating independently, have each a section at hand to replenish the ammunition expended. The Horse Artillery Brigade Ammunition Columns carried, besides S.A.A. for corps troops, other than artillery, the reserve of
pom-pom ammunition. The Howitzer Brigade Ammunition Column (BAC) included ammunition wagons (with limber), one wagon per howitzer, and one GS wagon for stores, with at least 132 horses (riding and draft, using six per wagon). The Columns operational task was to have available a constant supply, and bring forward, forty-eight rounds per howitzer, to a firing Batterys entrenched position, or to supply it to the Batterys own ammunition wagon lines. The Howitzer BAC was divided into two sections, they commanded by Lieutenants, each tasked to two Batteries, and included a Battery Sergeant-Major, a Battery
Quartermaster Sergeant, a Farrier-Sergeant, Shoeing Smiths (of which 1 would be a Corporal), 2 Saddlers (driver equipment), 2 Wheel-Wrights, a Trumpeter, 4 Sergeants, 5 Corporals, 5 Bombardiers, 3 Gunners acting as Batmen, Signalers, Drivers, and The Gunners. Some miles to the rear were the Divisional Ammunition Columns, which on the one hand replenish the empty wagons of the Columns in front, and on the other draw fresh supplies from the depots on the
line of communication. According to the April 1915 War Establishment Organization Tables: New Army (40/WO/2425), it would have 12 Officers, 1 Warrant Officer, 10 Sergeants, 32 Artificers and 473 Other Ranks: Total 528 (and a Base Detachment of 49); seeing some 140 in No, 1,2,3 Sections and 84 in No. 4 Section plus a total of 683 horses. The Fifth Section: Heavy Portion for 60-pounder ammunition, were removed from the BEF DAC establishment in early in 1915 when the 60-pdr guns were withdrawn from Divisions. The Divisional Ammunition Column collected ammunition from the Army Service Corps Divisional Ammunition Park, as the higher movement and supply of ammunition was coordinated at Corps level. A second scale of ammunition was stored in the Divisional Ammunition Park whilst a third scale was stored in the Corps Ammunition Park, which received and held replenishment from the Corps Ordnance Depot. Mechanical transport companies of the Army Service Corps carried out ammunition supply for RGA Heavy and Siege Batteries, given one company was included within each Army and Corps. 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. 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. ==The British Army and Dominion Artillery after May 1916==