During the Khilafat of Umar ibn al-Khattab, who did the Muslims fight in present-day Iran?

عمر بن الخطاب کے دور خلافت میں موجودہ ایران میں مسلمانوں نے کس سے جنگ کی؟

Byzantine Empire

Sassanian Empire

Roman Empire

Ottoman Empire

Explanation

During Umar's reign, the caliphate expanded at an unprecedented rate, conquering the Sasanian Empire and more than two-thirds of the Byzantine Empire