Cinco De Mayo (May 5) is celebrated the anniversary of Mexico's victory over the Second French Empire at the Battle of Puebla in 1862. This battle was the morale booster for the Mexicans as they continued to fight with the French. General Ignacio Zaragoza who led the Mexicans to victory at the Battle of Puebla died shortly after, and a larger French force ultimately defeated the Mexican army at a Second Battle of Puebla and occupied Mexico City.
However, Mexico did not cease as their American allies ended the civil war loaned money and guns to Mexican liberals and was able to push France back. Celebrating Cinco de Mayo has become associated with the celebration of Mexican-American culture. Being observed since 1863.