Maximilian I (Spanish: Maximiliano I; Born Ferdinand Maximilian Joseph; 6 July 1832 – 19 June 1867) was the only monarch of the Second Mexican Empire. He was a younger brother of the Austrian emperor Franz Joseph I. After a distinguished career in the Austrian Navy, he entered into a scheme with Napoleon III of France to rule Mexico. France had invaded Mexico in 1861, with the implicit support and approval of other European powers, as part of the War of the French Intervention. Seeking to legitimize French rule, Napoleon III invited Maximilian to establish a new Mexican monarchy. With the support of the French army and a group of conservative Mexican monarchists, Maximilian traveled to Mexico where he declared himself Emperor of Mexico on 10 April 1864.