While the Anglo-Egyptian infantry were able to make use of their superior firepower from behind a zariba barricade without suffering significant casualties, the cavalry and camel corps deployed to the centre-north of the main force found themselves under threat from the Mahadist Green Standard force of about 15,000 warriors. The commander of the Anglo-Egyptian mounted troops Lieutenant Colonel R.G. Broadwood used his cavalry to draw off part of the advancing Ansar attackers under Osman Digna but the slower-moving camel troops, attempting to regain the protection of the zariba, found themselves being closely pursued by Green Standard horsemen. This marked a crucial stage of the battle but Kitchener was able to deploy two gunboats to a position on the river where their cannon and Nordenfelt guns broke up the Mahadist force before it could destroy Broadwood's detachment and possibly penetrate the flank of the Anglo-Egyptian infantry.