_Column._ Bodies of troops on parallel and successive alignment, at a distance from one another equal to their own frontage. _Company Column._ A company in column of sections. _Quarter Column._ Companies on parallel and successive alignments, at a distance from one another of six paces. _Company._ The tactical unit of infantry. It is divided into two half-companies, each of which is again divided into two sections. A squad is the half of a section, formed under a selected leader, for purposes of discipline and manœuvre. _Covering._ The act of one or more men placing themselves correctly in rear of one another. _Defile._ A portion of the route which troops can only traverse on a narrow front; _e.g._, a mountain pass, a bridge, an embankment. _To Deploy._ To change formation from column or quarter column into line on the same alignment. _Depth._ The space occupied by a body of troops from front to rear. _Distance._ The space between men or bodies of troops, from front to rear. _Division._ Two brigades with certain divisional troops. _Direction, The battalion, company, section, or file, battalion responsible for keeping the direction of the (company, line of march. section or file) of._ _To Dress._ To take up the alignment correctly. _Drill._ The execution of movements in unison. Drill is of two kinds. _Close order drill_ teaches the formations and movements suitable to the assembly, the march, to many phases of savage warfare, and to ceremonial parades. In close order the troops are formed and move in accordance with the instructions laid down in this manual; the words of command are prescribed, and the rank and file have only to obey orders. _Skirmishing drill_ is the foundation of the formations and movements suitable to battle and reconnaissance. Very few rules can be prescribed, and all ranks must act to a large extent independently in carrying out orders.