How did the terms of the Congress of Vienna led to widespread discontent in Europe, especially in Italy and the German states?

The terms of the Congress of Vienna led to widespread discontent in Europe, especially in Italy and the German states by the numerous attempts at revolution in 1848 which created national tension.

The Congress of Vienna was held after the defeat of Napoleon Bonaparte and some of the terms of the Congress was to help protect France against future attacks by surrounding it with strong countries who could come to her aid and to make sure that there was a power balance so that one country would not be more powerful than all the others.

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