Which has been a direct effect of nationalism in Europe?

"The split of the Austro-Hungarian Empire" has been a direct effect of nationalism in Europe.

Explanation:

The Austro-Hungarian Empire was separated because of the few ethnicities residing in the Empire with many beliefs and cultures. Nationalists made various cultural groups in order to join their efforts and call for autonomy to make country states. (Nationalism is characterized as distinguishing proof with one's very own country and support for it's regard, especially to the avoidance or weakness to the interests of different countries.)

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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

deadpool

explanation: