When about 1,500 yards from a line of flags on the left front marking the enemy's position, the guns fired four or five shells, and hundreds of men were seen to rise up and bolt, leaving only their standards visible. Then on a sudden came the enemy's attack. To resist it the square was halted on the face of a hill sloping towards the enemy's position, and a hurried attempt was made to close up the rear. When the order to close up was given, the Naval Brigade had begun to move the Gardner gun from its position in middle of the rear face and put it at the left rear corner of the square. In order to do this it had to be taken through the camels, which were crowded together between the two positions, and in the confusion when the rear closed up the gun and the sailors round it were left outside the formation; they were thus at first dangerously exposed, but, happily, just before the rush the Gardner gun was drawn back, taken through the left face, and brought into action a few paces in front of it.

The first intimation of the impending charge was the running in at full speed of the skirmishers. They were followed by a black mass of Arabs, said to have been 5,000 in number, who, rising suddenly out of cover when the troops were at a distance of 450 yards from the flags, made straight for the square. Their shouts as they came on were described by an eye-witness as being like the roar of the sea. Headed by mounted emirs or sheikhs with banners in hand, they neared the left front of the square, where they were received with such a deadly fire from the (dismounted) Mounted Infantry that they swerved round the left flank and made a furious onslaught on the left rear of the square, where the Heavy Camel Regiment was stationed.

The rush was so sudden that the skirmishers had barely time to reach the square before the enemy fell upon the Heavy Camel Corps,[109] who, to avoid killing their own men, were for some minutes compelled to reserve their fire. Among the first to feel the effects of the charge were the Naval Brigade, which had, as already stated, put their gun outside of the square. After firing eight rounds at the advancing enemy, it was noticed that the elevation was too great. This was rectified, but after six more rounds the gun jammed and became useless. When Lord Charles Beresford was attempting to clear it with the assistance of his chief boatswain's mate, the enemy came on them, spearing the latter, and knocking Lord Charles down under the gun. His two officers, Lieutenants Pigott and De Lisle, were speared, whilst the rest of the Naval Brigade were driven back for a few minutes, when a rush was made, and the gun recaptured, Lord Charles then getting back unhurt into the square.

With such impetuosity was the charge made that the Heavy Camel Corps were borne back, and the square penetrated by the sheer weight of numbers.

Frantic shouts to the Guards to stand firm were heard. Both officers and men still faced the enemy, although the line of the Heavies was bent into an irregular semicircle extending into the square as far as the kneeling camels behind. These camels formed a useful breastwork, beyond which the assailants could not penetrate, and over and around the animals the battle raged, both parties fighting hand to hand, bayonet against spear.

For ten minutes a desperate struggle extended from the left rear to the centre. It was at this period that Colonel Burnaby fell, a spear having severed his jugular vein, but not until he had killed with his own hand more than one of his assailants. Stewart's horse was thrown off his legs and then speared, and his orderly was killed beside him. The General's life was only saved by the coolness and presence of mind of Sir Charles Wilson, who was standing next to him. A few of the enemy had crawled in between the camels, and one man who had succeeded in doing this was making, spear in hand, for the General. Sir Charles Wilson observed the move, whipped out his revolver, and shot the man dead.

Many of the camels were speared by the assailants, and the interior of the square formed a mass of falling camels and struggling combatants, half hidden amid dust and smoke. The issue could not, however, be said to have been a moment in doubt, for the Heavy Camel Corps were soon supported by soldiers from the other side of the square. These were in readiness to oppose any further advance had the line given way, though they were obliged to withhold their fire so long as the two parties were mingled in the strife. Later on they faced about and fired into the square, killing no doubt both friends and foes.

It was not long before every Arab who had entered the square was killed, the rest beaten back, and amid three hearty cheers the square re-formed on fresh ground away from the killed and wounded.

It was now half-past three, and as the enemy moved off the guns opened on them with grape at 500 yards range, and hastened their retreat.[110] They withdrew in a slow, sullen way, turning round from time to time as if anxious to come on again. Eventually the last of them disappeared over the sand-hills.

The force opposed to Stewart was stated by the prisoners taken to consist of ten tribes of about 800 men each. According to the report of the Intelligence Department, their numbers were still greater, and were made up of Ababdeh, Bisharin, and other Arabs from Berber, soldiers of the old Egyptian army, Arabs and others from Metammeh, men of the Mahdi's regular army (400 armed with rifles), and Arabs of various tribes from Kordofan.