What event turned the English Civil War into a war without rules? King Charles I executed for treason
Battle of Torrington
Sacking of Birmingham
Siege of Oxford

the conditions that made the byzantine empire vulnerable to attacks by the muslin turks were the sack of constantinople by western crusaders, the conquests of the sultanate of rum, presence of rival kingdoms and finally the set up of fiefdoms at the empire which were owned by the ghazis (turkish warriors).

nothing did. japan is wierd and always was.

powerful warriors rose to become chiefs, who had a privileged place in society.