The fall of Dongola was a shock to the Khalifa and his followers in
Omdurman, as it immediately placed their capital under threat. They thought it was likely that Kitchener would attack by striking across the desert from
Korti to Metemma, as the
Nile Expedition had done in 1885. The Khalifa therefore directed Osman Azraq to hold
Abu Klea and
Wad Bishara to hold Metemma with a force of
Ja'alin. He also ordered
Osman Digna in eastern Sudan and his commanders in
Kordofan and other regions to bring their forces in to Omdurman, strengthening its defences with some 150,000 additional fighters. This concentrated the Mahdist forces in the capital and the northern approaches, down the Nile to
Berber. Aware that Kitchener had a substantial river force which had by now passed up the second cataract into the
Dongola Reach, the Khalifa sought to prevent it steaming further upriver by blocking the sixth cataract at the Shabluka gorge, which was the last river obstacle before Omdurman. To this end forts were built at the northern end of the gorge, and the paddle-steamer
Bordein carried guns and supplies upriver. Kitchener did not advance on Omdurman after taking Dongola, and by May 1897 the Khalifa's forces from Kordofan had increased the size of his forces to the point where he felt able to take a more offensive stance. He therefore decided to advance the Kordofan army down the river to Metemma, in
Ja'alin country. The loyalty of the Ja'alin to the Mahdist state had weakened as the Egyptian army advanced, and they were particularly unwilling to have a large army quartered with them. Their chief, Abdallah wad Saad, therefore wrote to Kitchener on 24 June, pledging the loyalty of his people to Egypt and asking for men and weapons to assist them against the Khalifa. Kitchener sent 1,100 Remington rifles and ammunition, but they did not arrive in time to help the Ja'alin defend Metemma from the Khalifa's army, which arrived on 30 June and stormed the town, killing wad Saad and driving his surviving followers away. For Kitchener, much of 1897 was taken up extending the railway to Abu Hamed. The town was taken on 7 August and the railway reached it on 31 October. Even before this river strongpoint was secured, Kitchener ordered his gunboats to proceed upriver past the fourth cataract. With help from the local
Shayqiyya, the attempt began on 4 August, but the current was so strong that the gunboat
El Teb could not be hauled over the rapids, and capsized. However the
Metemma made the passage safely on 13 August, the
Tamai on 14, and on 19 and 20 August the new gunboats
Zafir,
Fateh and
Nasir also passed the cataract. The sudden advance of the river force and uncertainty about whether he would be reinforced by the Kordofan Army prompted the Mahdist commander in
Berber, Zeki Osman, to abandon the town on 24 August, and it was occupied by the Egyptians on 5 September. For the remainder of the year Kitchener extended the railway line forward from Abu Hamad, built up his forces in Berber, and fortified the north bank of the confluence with the
Atbarah River. Meanwhile, the Khalifa strengthened the defences of Omdurman and Metemma and prepared an attack on the Egyptian positions while the river was low and the gunboats could neither retreat below the fifth cataract nor advance above the sixth. ==Campaign of 1898==