We must now return to the revolt of Suleiman, the most serious military peril Gordon had to deal with in Africa, which was in its main features similar to the later uprising under the Mahdi. At the first collision with that young leader of the slave-dealers, Gordon had triumphed by his quickness and daring; but he had seen that Suleiman was not thoroughly cowed, and he had warned him that if he revolted again the result would inevitably be his ruin. Suleiman had not taken the warning to heart, and was now in open revolt. His most powerful supporters were the Arab colonies, long settled in interior Africa, who, proud of their descent, were always willing to take part against the Turco-Egyptian Government. These men rallied to a certain extent to Suleiman, just as some years later they attached themselves to the Mahdi. As General Gordon wrote in 1878: "They were ready, and are still ready, to seize the first chance of shaking off the yoke of Egypt." It was during Gordon's absence at Cairo that Suleiman's plans matured, and he began the campaign by seizing the province of Bahr Gazelle. Immediately on receiving this intelligence, General Gordon fitted out an expedition; and as he could not take the command himself, he intrusted it to his best lieutenant, Romolo Gessi, an Italian of proved merit. Natural difficulties retarded the advance of the expedition. Heavy floods kept Gessi confined in his camp during three months, and the lukewarm supporters of the Government regarded this inaction as proof of inferiority. They consequently rallied to Suleiman, who soon found himself at the head of a force of 6000 men, while Gessi had only 300 regulars, two cannon, and 700 almost useless irregulars. It was as difficult for him to let the Governor-General know that he needed reinforcements as it was for General Gordon to send them. Some of his subordinates, in command of outlying detachments, refused to obey his summons, preferring to carry on a little slave-hunting on their own account. His troops were on the verge of mutiny: he had to shoot one ringleader with his own hand.