Separated from his son and wife, who had come under Austrian control, cut off from the allowance guaranteed to him by the Treaty of Fontainebleau, and aware of rumours he was about to be banished to a remote island in the Atlantic Ocean, Napoleon escaped from Elba on February 26 1815. He made a surprise march on March 1, 1815 to Paris. His former troops joined him and Louis XVIII fled to exile. He again became ruler of France for a length of 100 days. Napoleon was defeated at the Battle of Waterloo by the British under Duke of Wellington and Prussians on June 18 1815, which was his last battle. Napoleon was again captured and taken to his second exile on the island of Saint Helena on the Atlantic Ocean.