This breaking up of brigades is practically induced by the two regiment brigade organization. (Par. 471 German I. D. R.). When once the brigade commander has assigned sections or points of attack to his regiments, there remains very little for him to do. He can form a reserve only by taking two battalions from one regiment, or one battalion from each. The brigade is, however, not like the regiment, an entity of bodies of troops, but a unit assembled for tactical purposes, which may, without regard to the whole, be increased or diminished by one or more battalions in case of necessity. On the march and in action the brigade organization as a subdivision of the division cannot always be maintained; groups are frequently formed in which the normal units must be broken up. In large battles the brigade is the largest force which may yet be employed as an intact unit, although the employment of infantry by regiments will continue to be the rule. Brigade commanders are necessary for decreasing units of command and desirable for relieving the division commanders of a part of their work. In time of peace brigade commanders are useful for directing recruitment and, moreover, as connecting links between regiments and the division. The unmistakable advantages of the three-battalion organization have induced the United States to form its brigades of three regiments, each of three battalions (of 400 men each). An English division consists of three brigades of four battalions each. 4. INTRENCHING TOOL EQUIPMENT.[45] [45] In the Russo-Japanese war the Russian companies were equipped with 80 small spades and 20 hand axes; the Japanese companies with 68 small spades, 17 mattocks, 8 hatchets, and 30 wire cutters. Earth as a covering material and, incidental thereto, the adoption of the small spade after the Russo-Turkish war, have increased in importance owing to the greater penetrating power of the modern infantry bullets. The disadvantages of the spade lie in the danger of its being misused and in the consequent impairment of offensive spirit. There is, moreover, danger that the fire effect will be impaired and subordinated to considerations of cover. The spade should therefore not be employed on every occasion, but only when the tactical purpose in view requires it.