For cavalry, a regiment consists of about 620 officers and men of all ranks; this body is divided into three service squadrons, each of an approximate strength of 160 officers, non-commissioned officers, and men, the remainder of the strength of the unit forming the “reserve squadron,” devoted to the headquarters staff--the commanding officer and administrative staff of the regiment, as well as the “pom-pom” or one-pounder quick-firer, of which one is included in the establishment of every cavalry regiment. In this connection it is probable that the experiences of the present European war will lead to the adoption of a greater number of these quick-firers, and in future each cavalry regiment will probably have at least two “pom-poms” as part of its regular equipment. The possession of these, of course, involves the training of a gun crew for each weapon--a full complement of gunners and drivers. For artillery, a brigade is divided into three batteries, each of an approximate strength of 150 men and six guns (the artillery battery corresponds to the cavalry squadron and to the infantry company) and, in addition, one ammunition column, together with transport and auxiliary staff, making up a total of about 600 officers, non-commissioned officers, and men. This refers to the field artillery, which forms the bulk of the British artillery strength, and is armed with 18½-pounder quick-firing guns. The Royal Horse Artillery is armed with a lighter gun, and is used mainly as support to cavalry in single batteries. It is so constituted as to be more mobile and capable of rendering quicker service than the R.F.A. Horse artillery is hardly ever constituted into brigades, as is the field artillery. Horse artillery, again, has no counterpart in the armies of Continental nations, so far as mobility and quality of armament are in question. Infantry reckons its numbers by battalions, of which the war strength is approximately 1010 officers, non-commissioned officers, and men per battalion. Each battalion is divided into four double companies, the “double-company system” having been adopted in order to compensate for a certain shortage of officers. The double company may be reckoned at 240 officers, non-commissioned officers, and men, roughly, and the remainder of the total is taken up by two maxim-gun sections and the headquarters staff of the unit. As in the case of the cavalry “pom-pom,” it is more than likely that the number of maxims or machine-guns per battalion will be increased, as a result of the experiences gained in the present Continental war.