August 21

August 15 in history 636 – Arab–Byzantine wars: The Battle of Yarmouk between Byzantine Empire and Rashidun Caliphate begins. 717 – Arab–Byzantine wars: Maslama ibn Abd al-Malik begins the Second Arab Siege of Constantinople, which…

The Aphelion, the point in the year when the Earth is farthest from the Sun, occurs around this date. July 4 in History 362 BC – Battle of Mantinea: The Thebans, led by Epaminondas, defeated the Spartans. 414 – Emperor …