21st March » Battle of Vincy between Charles Martel and Ragenfrid.
25th March » Theodosios III resigns the throne to the Byzantine Empire to enter the clergy.
15th August » Arab–Byzantine wars: Maslamah ibn Abd al-Malik begins the Second Arab Siege of Constantinople, which will last for nearly a year.
1st September » Siege of Constantinople (717–18) named Siege of Constantinople: The Muslim Navy fleet or armada with 1,800 ships, is defeated by the Byzantine navy through the use of Greek fire.