Which problem was caused at the end of Napoleonic War of 1815?

New alliances were formed.

Like cultures were separated.

Countries had been dissolved.

People were weak from disease.

A new alliances were formed because near the end of the war napoleon had conquered a ton of land and had lots of power so his enemies came together to form a alliance to attack and destroy his army and they succeed, later they exiled him to a island where he spent a few years on and later came back to France to start another revolution.