=85. Orders defined; when employed.= In these regulations an =order= embraces instructions or directions given orally or in writing in terms suited to the particular occasion and not prescribed herein. =Orders= are employed only when the =commands= prescribed herein do not sufficiently indicate the will of the commander. Orders are more fully described in paragraphs 378 to 383, inclusive. (36) Commands =86. Command defined.= In these regulations a =command= is the will of the commander expressed in the phraseology prescribed herein. (37) =87. Kinds of commands; how given.= There are two kinds of commands: The =preparatory= command, such as =forward=, indicates the movement that is to be executed. The command of =execution=, such as =MARCH=, =HALT=, or =ARMS=, causes the execution. =Preparatory= commands are distinguished by =italics=; those of execution by =CAPITALS=. Where it is not mentioned in the text who gives the commands prescribed, they are to be given by the commander of the unit concerned. The =preparatory= command should be given at such an interval of time before the command of =execution= as to admit of being properly understood; the command of =execution= should be given at the instant the movement is to commence. The tone of command is animated, distinct, and of a loudness proportioned to the number of men for whom it is intended. Each =preparatory= command is enunciated distinctly, with a rising inflection at the end, and in such manner that the command of =execution= may be more energetic. The command of =execution= is firm in tone and brief. (38) =88. Battalion and higher commanders repeat commands of superiors; battalion largest unit executing movement at command of its commander.= Majors and commanders of units larger than a battalion repeat such commands of their superiors as are to be executed by their units, facing their units for that purpose. The battalion is the largest unit that executes a movement at the command of execution of its commander. (39) =89. Facing troops and avoiding indifference when giving commands.= When giving commands to troops it is usually best to face toward them. Indifference in giving commands must be avoided as it leads to laxity in execution. Commands should be given with spirit at all times. (40) Bugle Signals =90. Bugle signals that may be used on and off the field of battle.= The authorized bugle signals are published in Part V of these regulations. The following bugle signals may be used off the battlefield, when not likely to convey information to the enemy: =Attention:= Troops are brought to attention. =Attention to orders:= Troops to fix their attention. =Forward, march:= Used also to execute quick time from double time. =Double time, march.= =To the rear, march:= In close order, execute =squads right about=. =Halt.= =Assemble, march.= The following bugle signals may be used on the battlefield: