Battle of Yarmuk:
The Battle of Yarmouk was a major battle between the Muslim Arab forces of the Rashidun Caliphate and the armies of the East Roman-Byzantine Empire. The battle consisted of a series of engagements that lasted for six days in August 636, near the Yarmouk River, along what is today the border between Syria and Jordan, south-east of the Sea of Galilee. The result of the battle was a complete Muslim victory which ended Byzantine rule in Syria.
Battle of Qadissiyyah:
The Battle of al-Qādisiyyah was fought in 636; it was the decisive engagement between the Arab muslim army and the Sassanid Persian army during the first period of Muslim expansion. It resulted in the Islamic conquest of Persia, and was key to the conquest of Iraq. The battle also saw the alleged alliance of Emperor Yazdegerd III with Emperor Heraclius, who then married off his granddaughter Manyanh to Yazdegerd as a symbol of alliance.
The Battle of Guadelete (Conquest of Hispania):
The Battle of Guadalete was fought in 711 or 712 at an unidentified location between the Christian Visigoths of Hispania under their king, Roderic, and an invading force of Muslim Arabs and Berbers under Ṭāriq ibn Ziyad. The battle was significant as the culmination of a series of Arab-Berber attacks and the beginning of the Islamic conquest of Hispania. In the battle Roderic probably lost his life, along with many members of the Visigothic nobility, opening the way for the capture of Visigothic capital of Toledo.