What was the name of Napoleon's return to power in 1815?

Napoleon’s return to power in 1815 was called the Hundred Days.

The period began when Napoleon escaped exile on Elba and landed in France on 1 March 1815. He entered Paris on 20 March, prompting King Louis XVIII to flee and allowing Napoleon to reclaim the imperial government without a major battle for the capital.

The name refers to the brief restoration of Napoleon’s rule before his final defeat. Historians use slightly different boundaries: the period is often dated from his return to Paris on 20 March to Louis XVIII’s restoration on 8 July, which totals 110 days. Some accounts instead count from the landing at Golfe-Juan to the defeat at Waterloo.

Napoleon reorganised the army and marched into Belgium, hoping to defeat British and Prussian forces separately. His campaign ended at Waterloo on 18 June. After abdicating, he surrendered and was sent to the remote island of Saint Helena, where he died in 1821.

The “Three Glorious Days” refers to the July Revolution of 1830, not Napoleon’s 1815 comeback.