For this object, two followed Lyttelton's 4th Brigade, and two the 6th; the last, under Colonel Long, being accompanied by six naval 12-pounders.
From these dispositions it appears, as is clearly stated by Buller in his report, that all the differing factors in the attack were to converge for their object, and according to their respective qualities, upon "the kopjes north of the iron bridge"-- to use Clery's expression in the orders for battle.

The 2nd Brigade marched upon them direct; the 5th approached their right flank by way of the Bridle Drift; the 4th and 6th reinforced, as required, each of the others; the four batteries--two on either side--brought a cross-fire upon the same objects; while the flanking force on the British right was to assist by an enfilading fire from Hlangwane.

To combine {p.227} several separate efforts, so that by mutual support and effect each at the critical moments contributes its due share to the one main exertion, is always difficult.

Failure may ensue from lack of the nicest attention on the part of any one subordinate, or from those chances which must always be allowed for in war.

The British at Colenso suffered from both causes.
Hart, on the left, having the longest road to reach the kopjes, moved first.