The reasons for the battle of Al-Qadisiyah: The military clash between Muslims and Persians traveled a long way during the reign of the Caliph Al-Siddiq in Iraq and continued safely until the Islamic call made its way to the world during the reign of Omar bin Al-Khattab, may God be pleased with him. Al-Islamiya who made their way to the people in Iraq, and the battle of Qadisiyah was this decisive meeting.

The Persians' home front was turbulent at that time, and competition was intense over Al-Mada'in, but they gathered to fight the Muslims, and Yazdegerd declared a state of emergency and began to equip the army with people of experience and assigned Rustam to lead the army and began preparing the military plan for the war, and when Caliph Umar ibn al-Khattab knew about this, he decided to end this conflict And Saad bin Abi Waqas sent to the king of the Persians inviting him to Islam, but the Persians thought that this was due to the weakness of the Muslims and they refused the invitation.

The Islamic army was prepared and the people went out for jihad, and the Commander of the Faithful, led by the army, was assigned to our master Saad bin Abi Waqas for his courage and courage. He walked until he landed in Qadisiyah and Askar in Qadis, and he stayed in Qadisiyah for a month without seeing any of the Persians.

And he used to send the companies to Kaskar and Anbar, and return the spoils, and he used to send his eyes to know the news of the Persians and told him that Yazdgerd had prepared a large army to expel the Muslims from Iraq, and after Saad at the beginning for the king of the Persians to negotiate. For war, it was Monday, Shawwal 27, 15 AH. He prayed the noon prayer and ordered the soldiers to recite Surat Al-Anfal, and peace and tranquility descended on them.

Saad was unable to lead the army because of an injury to his thigh, so he succeeded Khalid bin Arfatah al-Athri over the army, and the commander descended in an old, fortified palace, which is Qadis’s palace.
When the people objected to the emirate of Khalid, and the group was led by Abu Mujhan al-Thaqafi and prevented them from war, and the Persians used elephants, camels and horses, the frontispiece of the Islamic Army was Abdullah bin al-Mu'tam, Maysara Sharhabeel bin al-Samt, Maysara al-Qalb Zahra bin al-Hawiyah al-Tamimi and Maymana al-Qalb Asim bin Amr al-Tamimi.

The two armies met on the first day on the day of Arimath, and there was no fighting that night, and the second day, on the day of Agwas, on Friday the 14th of Shaban, was a day of great relief for the Muslims, and victory was their ally, the third day, Amas, was a day of affliction and the severity of the Muslims' patience with great patience.
On the fourth day, the night of Al-Harir, the news was cut off from Saad and Rostum, and the fourth day was the day of Qadisiyah. The Muslims achieved victory and the battle ended. It was one of the decisive battles in Islamic history. It decided the fate of Iraq and removed the rule of the Sasan family and decided the fate of the Islamic call. Al-Mada'in was conquered in the year 16 AH. Grand of tigers inlaid with pearls and rubies.