The object of the rally is to reestablish cohesion with a view to immediate action, or to form line in a new direction when the regular method of forming line would be slow or complicated. It is executed in the order of arrival of the elements of the command without regard to their normal order. The formation in which each unit is rallied is fixed in the drill instructions of that unit. =Rank.=--Two or more troopers placed side by side. =Scouts.=--Individual troopers detached from their commands and operating with a definite mission related to security or information. =Skirmishers.=--Dismounted troopers in line in extended order; also the formation in which the troopers are so placed. =Successive formation.=--A formation in which the elements take their places successively. =Tactical exercise.=--An operation against an outlined or represented enemy whose movements are restricted with a view to illustrating some particular tactical principle. PART I.--INDIVIDUAL INSTRUCTION. =Section 2. General provisions.= =34.=[6] Thorough training in the school of the trooper is the basis of efficiency. [Footnote 6: The numbers refer to paragraphs in the Cavalry Drill Regulations, 1916.] =35.= Short and frequent drills are preferable to long ones, which exhaust the attention of both instructor and recruit. =36.= As the instruction progresses, the recruits will be grouped according to proficiency, in order that all may advance as rapidly as their abilities permit. Those who lack aptitude and quickness will be separated from the others and placed under experienced drillmasters. =37.= The individual dismounted instruction of the recruit is habitually given by experienced noncommissioned officers, especially selected for that purpose. All such instruction is under the careful personal supervision of a commissioned officer, and in the corresponding mounted instruction it is desirable that the actual instructor be a commissioned officer when this is practicable. All lieutenants will be required to instruct recruits in person sufficiently to acquire skill in such work. When recruits, upon their arrival at a station, are assigned to their respective troops for training, the captains prescribe and supervise the instruction. =38.= The instructor will always maintain a military bearing and by a quiet, firm demeanor, set a proper example to his men. A calm and even temper is indispensable. Unnecessarily loud commands and prolonged explanations are to be avoided. As the recruits become somewhat proficient in the school of the trooper, the officer superintending the instruction may call upon them in turn to drill the squad in his presence and to correct any errors that may be observed. This will increase their interest, hasten their instruction, and facilitate judgment upon their fitness for the duties of noncommissioned officers.