Crops such as sugar and tobacco were new world discoveries for the european colonizers. what was the main reason they were valued

they offered new flavor sensations which made them exotic and expensive

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).

the soviet union wanted to impose communist governments in eastern europe.