The mixed system, or the combination of the two preceding, has sometimes been employed with success.

Napoleon used this formation at Tagliamento, and the Russians at Eylau.

Each regiment was composed of three battalions, the first being deployed in line, and the other two formed in columns of attack by division in rear of the two extremities, as shown in Fig.30.It may in some cases be better to place the second and third battalions in line with the first, and on the two extremities of this battalion, in order to prolong the line of fire.

The centre of the line of each regiment would be less strong, however, than when the two battalions by column are placed in rear of the other which is deployed.

This mixed system of formation has many advocates, and in certain situations may be employed with great advantage.
4th.