Explain the historical circumstances that led to the historical development depicted in the image above. pls help me with this

The historical circumstances that led to the historical development depicted in the image above is:

According to the given question, we are asked to show the historical circumstances that led to the historical development depicted in the image above.

As a result of this, we can see that from the given map, we can see that there is the coming together of the different states to form one nation Germany as a result of nationalism.

Furthermore, Austria-Hungary begins to break apart, starting with Prussia.

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Germany unification occurs while Austria-Hungary separation occurs.

Explanation:

In Germany, due to nationalism all the parts united and made as one nation while in Austria-Hungary due to nationalism all parts are separated from one another. Unification of German occurs due to two wars, Prussia with Austria and Prussia with France. these two leads to nationalism in Germany and then extreme nationalism occurs which leads to first world war. This disunity among the people eventually led to the downfall of Austria.

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