Battles fought in the kahilifa of hazrat umer?

During the caliphate of Hazrat Umar ibn al-Khattab (634-644 CE), several significant battles were fought that expanded the Islamic empire. Notable among these were the Battle of Yarmouk against the Byzantine Empire in 636 CE, which led to the Muslim conquest of Syria, and the Battle of Qadisiyyah in 636 CE, which resulted in the defeat of the Sassanian Empire and paved the way for the Muslim conquest of Persia. Umar's leadership and strategic acumen were key to these victories, facilitating rapid territorial expansion. His era is marked by a significant spread of Islam and the establishment of administrative structures in newly acquired territories.