Need with the questions . plz answering one of them

How did the union blockade of the southern coast affect the confederacy? it forced the confederacy to build new railroads. it contributed to shortages of weapons and food. it encouraged europe to trade with the south. it halted all trade, leaving the south without supplies.

What are the strengths of the byzantine empire?

The most important units of the english armies which fought during the hindred years war were composed of