By the law of the 16th March, 1802, sect. 2, the United States artillery consists of five battalions, consisting of 1 colonel, 1 lieutenant colonel, 4 majors, 1 adjutant, 20 companies, each composed of 1 captain, 1 first lieutenant, 1 second lieutenant, 2 cadets, 4 serjeants, 4 corporals, 4 musicians, 8 artificers, and 56 privates; two teachers of music were added by the law of February 28, 1803. _March of the_ ARTILLERY. The marches of the artillery are, of all the operations of war, the most delicate; because they must not only be directed on the object you have in view, but according to the movements the enemy make. Armies generally march in 3 columns, the centre column of which is the artillery: should the army march in more columns, the artillery and heavy baggage march nevertheless in one or more of the centre columns; the situation of the enemy determines this. If they are far from the enemy, the baggage and ammunition go before or behind, or are sent by a particular road; an army in such a case cannot march in too many columns. But should the march be towards the enemy, the baggage must absolutely be all in the rear, and the whole artillery form the centre column, except some brigades, one of which marches at the head of each column, with guns loaded and burning matches, preceded by a detachment for their safety. The French almost invariably place their baggage in the centre. Suppose the enemy’s army in a condition to march towards the heads of your columns: the best disposition for the march is in 3 columns only; that of the centre for the artillery; for it is then easy to form it in order of battle. Hence it is equally commodious for each brigade of artillery to plant itself at the head of the troops, in the place marked for it, in such a manner, that the whole disposition being understood, and well executed, the line of battle may be quickly formed in an open country, and in the presence of any enemy, without risquing a surprise; by which method the artillery will always be in a condition to act as soon as the troops, provided it march in brigades. If your march should be through a country full of defiles, some cavalry and other light troops must march at the head of the columns, followed by a detachment of grenadiers and a brigade of artillery; cannon being absolutely necessary to obstruct the enemy’s forming into order of battle.