1. Bayonet man, 2. First thrower, 3. First carrier, 4. First spade man, 5. N. C. O. first squad, 6. Second bayonet man, 7. Second thrower, 8. Second carrier, 9. Spade man, in charge of second party. These parties will work up a trench until they come to a junction, when the first party in charge of the N. C. O. will continue straight on and the second party branch to the right or left, as the case may be, and as they come on other parties keep working up behind them, and the infantry gradually following taking possession of the line and starting consolidation work at once. Communication throughout these lengths of grenade parties is very difficult with men extended in single file, and the attendant confusion which accompanies such a stand. A system is required which will enable supplies of bombs to be passed up and casualties replaced automatically. This system cannot be laid down on any cut and dried lines, but must be figured out before the attack, with due consideration being given to the line of trenches to be attacked and the difficulties which will be encountered in getting supplies to that line, and it is only on the spot that such a system can be worked out. During an attack three grenades per man are issued to each unit detailed to open the attack, and these grenades are turned over to the bombers or used by the men themselves if necessary. When out of grenades themselves, the men take over the casualty’s, and it is the duty of a casualty when he is so able to, to leave his grenades and ammunition to the care of some other man before “going down.” Small depots should be established at frequent intervals along the trenches from which the attack starts, with careful consideration given to their safety from shell fire, if at all possible. Other depots must be established in the support and assembly trenches, and these will generally be supplied through a central station probably controlled by a brigade or division. Before starting the attack, every man and party should have had explained them in detail exactly what is required of them, and generally the following system is adopted: First bombing party of group-- Two bayonet men to protect grenade throwers, First bomber, First carrier, Second bomber, Second carrier, Group leader (N. C. O.), Two bayonet men to protect the group leader and the rear of party. * * * * * Second bombing party-- Formation as above. The head of the party must be in touch with the rear of the first party. Officer commanding in rear of second party. * * * * * Third and fourth bombing party-- Formation as above. Second in command in touch with rear of fourth party. Machine gun detachment, if available or considered necessary.