=388.= At the command: 1. =Right (left) half turn=, 2. =MARCH=; 3. =Forward=, 4. =MARCH=; or 3. =Squad=, 4. =HALT=, a change of direction of 45° may be made in accordance with the principles explained in pars. 386 and 387. The arm signal for the half turn follows the rule indicated for the full turn (par. 386). =389.= In all movements in these regulations in the course of which =fours=, =twos=, or =troopers= execute a turn or half turn this last movement is made by each element in accordance with the principles explained in pars. 386 and 387, except that the commands 3. =Forward=, 4. =MARCH=, are omitted and each element continues the march in the new direction, upon completion of the turn, unless the commands: 3. =Squad=, 4. =HALT=, are given. The guide of a four in the turn is always No. 2; the guide of a two the right trooper. =390.= Where only a slight change in the direction of march is desired; it is habitually accomplished by leading without any special command or signal therefor. The leader may caution: =INCLINE TO THE RIGHT (LEFT)=. The execution of this movement, like that of the turn, is a special case of leading applied to the march in line. The leader slightly alters the direction of march, the guide conforms to the leader's movements, and the other troopers conform to the movements of the guide. =391.= =Being in line, to form column of fours to a flank=: 1. =Fours right (left)=, 2. =MARCH.= The fours move simultaneously, each executing right turn and taking up the march in the new direction (par. 389). No. 2 of the four on the flank toward which the movement is executed is the guide upon whom the other Nos. 2 regulate during the movement (par. 326), as well as the guide of the resulting column (par. 374). The leader promptly takes position in front of the guide (par. 325). Gaits are regulated as in par. 337-_d_. =The movement dismounted= is executed on the same principles except that No. 2 of each four regulates his step and path as indicated for the dismounted turn (pars. 386, 387). (Fig. 33.) [Illustration: FIG. 39, par. 391.] =392.= =Column of twos= is not formed directly to a flank from line. Column of twos may be formed to the _front_ as explained in pars. 393 and 403, and the head of the column be at once marched in any desired direction. The same principle regulates the formation of =column of troopers= to a flank. =393.= =Being in column of fours, to form column of twos or troopers=: (_a_) To form column of twos: 1. =Right (left) by twos=, 2. =MARCH.= The right two of the leading four is the base. The other twos enter the column successively, the right two of each four being followed immediately by the left two of the same four, the left two obliquing to enter the column (par. 331). All distances are 4 feet (par. 368). Gaits are regulated as in movements from line into column (par. 337-a, c).