Briefly explain one development from the period of 1945 to 1990 that could be used to challenge the point of view you identified in Part A.

the great wall of china worked as a defense for the feudal states of the zhou dynasty to the north. during the warring states period more walls were put up to defend the borders of the different kingdoms. it was semi successful because despite the wall, the mongols eventually conquered china also the great wall provided protection to the economic development and cultural progress, safeguarded the trading routes such as the silk road, and secured transmission of information and transportation. @jayxboof

eroupe is a great mideval place and alot of wars went on alao

answer placeholder because the system is messed up