At the beginning of the war the numbers and types of gun were quite small: 30 13-pounders, 324 18-pounders, 24 60-pounders (four per battery) and 108 4.5in howitzers. By 1918 these figures had increased to 5,037 guns in calibres ranging from 6-pounders to 60-pounders, and 3in to 14in howitzers.
