Because they were different from other city-states
I believe that is the correct answer
The most obvious result of nationalism in the nineteenth century was that both the Italian states and the German states became unified countries. Prior to 1870 and 1871, respectively, Italy and Germany each consisted of many individual principalities. The conquest of most of Europe by Napoleon had set off a reaction in which peoples such as the Germans and Italians, who had historically only had an ethnic identity, now wished to create nation states,large...
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✓ Some slaves were freed by the British. -happened as a result of the Revolutionary War.
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Answer: September 11 attacks
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