What is the name of the battle that won the Mexican victory?

The correct answer to this question is the Battle of Puebla. This battle occurred on May 5, 1862. It took place during the Second French intervention in Mexico happened near Mexico's Puebla City. During this battle, Mexico had less equipment and fewer people, but they were still able to become victorious. In the long run, that was the boost they needed for their morality.

The Battle of Puebla is still important today, for it is why Cinco de Mayo is celebrated once every year. The holiday itself happens on May 5, which is the same date as the battle. Other countries recognize the landmark win for Mexico, which is why Cinco de Mayo is celebrated all over the world.