The Hundred Days , is the period between Napoleon Bonaparte 's return from exile on Elba to Paris on 20 March 1815 and the second restoration of King Louis XVIII on 8 July 1815 ( a period of 111 days ) . The Hundred Days , sometimes known as the Hundred Days of Napoleon or Napoleon 's Hundred Days for specificity , marked the period between Emperor Napoleon I of France 's return from exile on Elba to Paris on 20 March 1815 and the second restoration of King Louis XVIII on 8 July 1815 ( a period of 111 days ) .