 Look here, you have to tell your students war is not a theoretical thing. It's not an article. It's not a book which one has to remember. It is field and everything has to be done according to the field. And many impromptu things can occur which one cannot even think before. So one has to be prepared for those also and take care of those things also so that any type of threat is eliminated. So war is a big specialty and it requires big preparation and training. When you entered Makkah, first he reorganized his army. He divided them into three different portions. Now one portion was headed by Hazrat Khalid bin Walid, who we also call Saifullah. Some young men from Makkah came together and they tried to fight with Hazrat Khalid bin Walid. But they did not have the knowledge that they were doing such a big event. In just a little while, they left a few dead bodies on the ground and they vanished away. They could imagine that they can't fight at all whatsoever. When war happens and you enter the city, it is called built-up area war and it is a very difficult sort of fighting. Anybody from any house can fire on you, can do anything to you which you can't imagine, which you can't see. Hazrat Khalid bin Walid, r.a. heads off to him. He has never been defeated wherever he was. Whatever war he was, that army has not been single-time defeated. To make sure that the entire Makkah has been completed, to make sure that all the streets of Makkah are covered with his army, to make sure that there are no other elements, no other elements that can harm us by deceiving us or by deceiving us or by hurting us in any way. It is understood that he did not find any resistance. He did not try to fight anyone anywhere. This meant that the Makkah had been completed. They have almost surrendered. Hazrat Khalid bin Walid was completely satisfied with this whole process and then left Makkah. Hazrat Khalid bin Walid went to Safa and asked Hazrat Khalid bin Walid to leave Makkah. He briefed them as the Commanders are briefed after the end of the war. After this, the Holy Prophet, peace and blessings of Allah be upon him, took both the Ansar and the Muhajireen with him and entered the mosque of Haram.