Why did the United States interfered in Iran in the 1950s? What was the results of their interference

The United States wanted the removal of the monopoly of Anglo Iranian Oil company in Iran’s oil business. The United States wanted five of its petroleum companies such as Royal Dutch Shell and the Compagnie Française des Pétroles to draw to control Iran's petroleum. This led to the United States sponsoring protests by the citizens and and top government officials.

Their interference led to the overthrowing of President Mosaddegh Government by Britain who was America’s ally and the America companies coming in to draw from Iran’s oil.

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).