What historical events were taking place during "the great arsenal of democracy" speech

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).

an earnest tone.

because portia wants to know why brutus has been acting strange lately.

b.

one company controls all the means of production of a product.

~coco