Upon their defeat, they fled to Egypt. Muhammad Ali Pasha made preparations and sent an army under the command of his son, Prince Ismail. The army arrived in Cairo in the latter part of the year 1236 AH (1820 AD). It crossed the Dongola region from the north without resistance. In the south of this region, the Shaigiya tribe revolted and fought the Egyptian army. The army was victorious and marched north. The inhabitants of the Berber region submitted. The army crossed the river to Khartoum Island. Prince Ismail was impressed by Khartoum and its strategic location between the two Niles. He wrote to his father about his victories and then marched towards Sennar. As he approached, he wrote to King Adlan bin Idris, inviting him to surrender and warning him of the consequences. The king wrote back to the prince, saying, "The city of Sennar is protected by Roman soldiers. It has young men who love to fight day and night. Do not be surprised by your victory over the Shaigiya. Know that we are the kings and they are the subjects." When the letter reached Prince Ismail, he marched with his cavalry and infantry. The battle took place in the middle of the forest of Abu Saqra. The Sudanese had no weapons other than spears and swords. The Egyptian soldiers fired intensely upon them, causing them to flee. Prince Ismail pursued the defeated until they entered the city of Sennar. The prince went to the royal palace and found the king sitting on his throne. The prince entered and stood submissively before him, offering his sword as a sign of obedience and submission. He seated the king on his bed and sat on the ground like any other person. He turned to his companions and said, "This is what God willed, so let us accept His decree." After a while, Prince Ismail approached the king, brought him closer, and seated him beside him. He respected his dignity and took nothing from him except the right to command and prohibit. All those who ruled over Sudan followed the prince's example in honoring this house.