Secession is when a state decides to withdraw from the Union.
The Congress of Vienna reorganized Europe after the Napoleonic Wars.
The major goal was to establish a balance between the Five Powers - Austria, Prussia, England, France and Russia -
As a result, the French returned territories gained by Napoleon from 1795 - 1810. Russia extended its powers and received souveranity over Poland and Finland. Austria, too extended its territory.
The first draft of the Articles of Confederation did not include a provision for the federal government to levy taxes.