 The regiments were liable to be called out for defence against an invasion or an insurrection, and were not prepared for effective mobilisation; the units possessed no transport resources, or even a designated quartermaster.The third arm was the Volunteers, mainly drawn from small businessmen, artisans, and professionals; they were predominantly urban middle-class units, training at weekends and with no annual camp.There were 213 rifle corps and 66 corps of artillery, though the latter were mostly coastal artillery or static "position batteries" equipped with unwieldy 40-pounder guns, and they did not constitute an organised field force.