KAJTTTAL FOU NONCOMSnSSIONED CrFICEHS. 61 



Deployment. — An evolution In which the comroand extends 

 its front, as in forming line from column or in passing from 

 close order to extended order. 



Depth. — The space from front to rear of any formation, in- 

 cluding the front and rear elements. 



Directing leader. — The leader of a subordinate unit who 

 temporarily conducts the march when the commander is not 

 leading in person. A trooper in the rank of a platoon or 

 smaller unit who similarly conducts the march is termed a 

 directing guide. 



Direction of march. — The direction in which the base of the 

 command in question, whether actually in march or halted, 

 is facing at the instant considered. 



Disposition. — The distribution of the elements of a command, 

 and the formations and duties assigned to each for the accom- 

 plishment of a common purpose. 



Distance. — The space between men or bodies of troops 

 measured in the direction of depth. Distance is measured — 

 mounted, from the croup of Jthe horse in front to the head 

 of the horse in rear; dismounted, from the back of the trooper 

 in front to the breast of the trooper in rear. 



Dress. — The act of taking a correct alignment. 



Drill. — The exercises and evolutions taught on the drill 

 ground and executed in accordance with definitely prescribed 

 methods. 



Echelon. — A body of troops is in echelon with reference to 

 another when it is more advanced or less advanced and un- 

 masks or uncovers the other body, wholly or in part ; units 

 thus placed are called echelons. 



Element. — One of the component subdivisions of a command. 

 As used in these regulations the term clement is a general one 

 and may mean a single trooper, a set of twos, a four, section, 

 platoon, or larger unit, according to the command and forma- 

 tion that are being considered. The expression elements of the 

 column refers to the several troopers, four.^, platoons, or other 

 units that are placed successively, one behind another, in any 

 column formation. 



Evolutions. — Movements by which a command changes its 

 position or passes from one formation to another. 



