Who was ruling France at the time of el Cinco de Mayo?

During the time of the Battle of Puebla, which is celebrated on Cinco de Mayo (May 5, 1862), France was ruled by Emperor Napoleon III. He sought to expand French influence in Mexico, leading to the establishment of a short-lived monarchy under Maximilian I. This intervention was part of a broader strategy to assert French power in the Americas during a period of instability in Mexico.