Answer:
Because of Napoleon's escape from exile.
Step-by-step explanation:
After Napoleon Bonaparte was defeated and captured in the Battle of Waterloo, the Treaty of Paris of 1815 exiled Napoleon and France was ordered to pay 700 million francs as war reparations and the border was retrieved to its original size of 1790.
Having been informed that Napoleon Bonaparte had escaped from his exile, The allied powers of European states who have signed the Treaty of Paris him as the "Enemy and Disturber of the Tranquility of the World." Napoleon was prohibited from any civil and social relations for not accepting the terms of his defeat.