Quraysh returns in force; victory slips away when the archers leave the hill, and Ḥamzah is among the seventy martyrs.
A confederacy of ten thousand besieges Madinah and breaks against a ditch, a windstorm, and three weeks of failure.
ʿAmr ibn al-ʿĀṣ plants the tent-city by the Babylon fortress — the seed of what will become Cairo.