What role did antonio lópez de santa anna play in the mexican-american war?
he was the ruler of mexico.
he was the leader of the american forces in texas.
he was the commander of the mexican military.
he was the mexican ambassador to the united states

where are the statements?

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).