• Power struggles weakened Persia after Persians and Avars failed to conquer Byzantium [626].
• Muhammad encouraged followers to worship Allah, do good works, and help the poor [610]. Opponents forced him out of the city of Mecca [622, Hejira]. Muhammad returned and united Arab tribes [630/634, War of the Ridda]. His successor conquered Syria, Egypt, and Persia [634/656, War of the Jihad].
• Rebels killed China's king after a military loss in Korea [614]. The Tang ruled for 300 years [618/907].